I happened to photograph three Brewer’s blackbirds last Sept. 20, the day Venezuelan President Hugo Chavez drew applause at the UN by comparing President Bush’s supposed sulphuric stench to the devil’s and the day after Iranian President Mahmoud Ahmadinejad and President Bush clashed in the General Assembly over Iran’s nuclear program. Chavez’s sarcastic comments were, in fact, mild given that the Bush Administration had taken part in a 2002 coup that tossed Chavez out of office — only to have Venezuela’s poor take to the streets and reinstall him two days later. The widespread applause Chavez and Amadinejad received in the UN General Assembly made this picture seem symbolic: Chavez (at left) eats the lunch of a frustrated President Bush (center) while Ahmadinejad ominously looks on.

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Now that the Park Service has bought the farm, and rancher Rich Giacomini’s cows no longer give Point Reyes Station its traditional redolence, perhaps it’s time for a new town mascot to replace the Holstein.

Having often sat on the bench in front of the Bovine while eating a sweet roll, I would vote for the Point Reyes Station’s ubiquitous blackbird. Not only do Brewer’s blackbirds strut about the sidewalk in front of the bakery looking for crumbs, hundreds of them often flock across the street in the Bank of Petaluma’s pine trees, where their chirping creates a din that’s audible a block away.

Although set off by several white feathers, the red on a Tricolored blackbird’s wing is far less noticeable than on a Red-winged blackbird’s. Tricolors are often found in the company of Brewer’s and Red-winged blackbirds.

On Point Reyes Station’s main street, the blackbirds’ best show occurs in Spring when they brood in the trees and hedges around the bank and neighboring market. The typical drama consists of Palace Market customers parking their cars and walking through the store’s parking lot, only to suddenly flinch and look around in bewilderment after an unobserved blackbird pecks them on the head as it flies by.

Indeed, Brewer’s blackbirds seem fearless during the brooding season. I once saw a blackbird peck a housecat on the head along Mesa Road behind the bank. When a second blackbird pecked it, the cat ran across the bank’s parking lot and ducked under a car.

I was impressed that two birds could have a cat on the run, but the show was just getting underway. There was no stopping one particularly aggressive blackbird that landed under one side of the car, causing — to my amazement — the cat to dash out from under the opposite side.

Blackbirds are members of the Icteridae family, and “the big flocks of Icterids in West Marin,” Point Reyes Station ornithologist Rich Stallcup told me this week, “are made up mostly of Red-winged blackbirds — invariably with a sprinkling of Brewer’s and Tricolors.

A mix of Brewer’s and Red-winged blackbirds on my railing.

The flocks that gather on powerlines along the levee road around sunset each evening, are Red-winged blackbirds, Point Reyes Station naturalist Jules Evans pointed out Wednesday when we ran into each other at the post office.

Blackbirds typically head to their roosting site “from 30 minutes before sunset to 15 minutes after sunset,” researcher Gordon Boudreau of Santa Rita Technology in Menlo Park reported to the Third Vertebrate Pest Conference 40 years ago at the University of Nebraska.

Boudreau added that although the bulk of a Red-winged flock has reached the roost site by 15 minutes after sunset, “stragglers continue to arrive for an additional 15 minutes…. All but the late stragglers habitually ‘pre-roost’ on elevated perches nearby for varying lengths of time before moving into the night roosts.

“These pre-roosts may be atop their roost vegetation; it may be in trees or on powerlines a quarter to a half mile away…. Late-arriving stragglers fly directly to the night roost.”

Why do blackbirds chatter so much when they flock together? Both Stallcup and Evans attributed the noise to their being “gregarious.” Said Stallcup, “They chatter incessantly as do all animal groups that can.”

Evans added that even small shorebirds continually chatter when in flocks although usually too softly for us to hear.

The Brewer’s blackbird (seen here) is named after 19th century ornithologist Thomas Mayo Brewer of Boston. Brewer’s blackbirds (Euphagus cynanocephalus) are protected under the 1918 Migratory Bird Treaty Act, but their survival, Wikipedia notes, is of the “least concern” among protected birds.

In fact, most ornithologists don’t consider the Brewer’s blackbird a “migratory species” at all. The birds do, however, move from place to place seeking abundant sources of food, which for them is mostly insects, spiders, and (particularly in Fall and Winter) seeds.

“During the day,” Boudreau reported, “wintering blackbirds alternately feed and then loaf, depending on the availability of food. Feeding in open fields is usually [done] in leapfrog fashion, in which all move in one direction, the rear birds rising and landing ahead of [those in front].

“If undisturbed, this feeding pattern continues until the end of the field is reached whereupon the flock may move to another spot in the field or fly to a different area.”

Ornithologist Rich Stallcup of Point Reyes Station on Wednesday noted that “at least some of the birds” in this field uphill from my cabin are Tricolored blackbirds.” (At upper right, for example.) Tricolors are nearly “endemic” in California although their worldwide population is small, Stallcup added.

While blackbirds benefit agriculture by eating enormous amounts of caterpillars, beetles, grasshoppers, and other destructive insects, they can also consume large amounts of grain and seed. And when in season, fruit and nuts are also part of their diets.

At the third Vertebrate Pest Conference held back in 1967, researcher Boudreau revealed he had found a way for farmers and ranchers to avoid losing grain, seed, and nuts to Red-winged blackbirds. After experimenting with scarecrows, explosions, shotguns etc., he concluded the only control that works is “biosonic.”

The trick is to tape record the alarm call of each kind of blackbird, which is quite “species specific,” Boudreau reported. These alarm sounds are then “amplified and projected at the birds through loudspeakers. The method is highly effective if the proper sounds are used….

“[An alarm call] indicates the presence of a predator and is usually well developed in gregarious species.” Blackbirds tend, Boudreau had observed, “to avoid areas where these sounds are present.”

Interesting aside: By 1979, twelve years after Boudreau presented his findings, Lee Martin of BlueBird Enterprises in Fresno told a subsequent University of Nebraska conference that by then biosonic controls were in use internationally to keep gulls away from major airports. He suggested they also be used to keep migrating birds from resting at industrial-waste ponds where they frequently ingest lethal amounts of waste materials.

I’ve yet to hear any biosonic blasts of bird alarms in West Marin, which suggests the local blackbird population isn’t too serious a problem for all the ranches, airports, and industry here. Just for housecats and springtime shoppers at the Palace Market.

With my neighbor’s housecat keeping them company, eight blacktail deer spent Wednesday afternoon grazing and chewing their cud in the fields around my cabin.

Housecats don’t bother blacktails, unlike the coyote that crawled through my fence in January and caused the deer to immediately scatter.

A blacktail doe watches a housecat on a woodpile washing itself.

Before we go any further with this, however, let’s get our terms straight, for the word “deer” is constantly evolving. Our word “deer” comes from the Old English word “deor,” which referred to animals in general, of course, including deer. In Middle English, the language of Chaucer (c.1343-1400), the word was spelled “der,” and The American Heritage Dictionary notes it could refer to all manner of creatures, including “a fish, an ant, or a fox.”

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Even in the plays of Shakespeare (1564-1616), who wrote in Modern English (albeit of the Elizabethan variety), the meaning of the word remains uncertain. In King Lear, Act III, scene iv, the Earl of Gloucester’s much-abused son Tom ‘o Bedlam (disguised as Edgar) laments, “Mice and rats, and such small deer,/ Have been Tom’s food for seven long year.”

What does all this mean? “Deer is a commonly cited example of a semantic process called specialization, by which the range of meaning of a word is narrowed or restricted [over time],” the dictionary explains.

Male North American blacktail, white tail, and mule deer are ‘bucks’ while male European red deer are ’stags.’

Had Shakespeare lived 10 million years earlier, however, Edgar’s lament might have made more sense. As Bruce Morris writes for Bay Nature, “All three major deer species native to North America (blacktail, whitetail, and mule) trace their ancestry back to a primordial, rabbit-size Odocoileus, which had fangs and no antlers and lived around the Arctic Circle some 10 million years ago.”

Based on DNA tests, Morris adds, “researchers theorized that whitetails (Odocoileus viginianus) emerged as a separate species on the East Coast about 3.5 million years ago.

A blacktail buck, characteristically stretching his neck low to the ground, sniffs for a doe in estrus.

“They apparently expanded their range down the East Coast and then westward across the continent until reaching the Pacific Ocean in what is now California some 1.5 million years ago. Moving north up the coast, they evolved into blacktails….

“Columbian blacktail deer (Odocoileus hemionus columbianus) are the subspecies of blacktails native to the Bay Area…. According to the California Department of Fish and Game, there are now approximately 560,000 deer in all California, about 320,000 of which are Columbian blacktails….”

A seemingly perplexed fawn watches as the doe runs away from the buck, who licks his nose in to help pick up her scent.

Morris reports that “blacktails have a typical lifespan in the wild of seven to 10 years, but they can survive in suburban habitat for as long as 17 to 20 years if unmolested….

The breeding season is in November, notes Mary Ann Thomas writing about West Coast blacktails from Southern Arkansas University. Gestation lasts about 200 days with typically two fawns born. The fawns’ camouflage spots begin to fade after a month.

“Suburban deer have minuscule home ranges, measuring three or four blocks for females,” Morris notes in Bay Nature, “whereas wild deer inhabit territories that extend for several miles.”

While mountain lions, and occasionally bobcats and coyotes, prey on deer, the biggest threat to West Marin’s blacktails are motor vehicles. In fact, being struck by automobiles is the biggest killer of deer nationwide: more than one million a year.

Connecticut alone reported that between 1995 and 2000, the number of deer struck by cars in that state tripled while the number struck by airplanes nationwide has averaged almost one a week for the past 10 years. Or so says Benner’s Gardens, which makes deer-fencing systems.

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A young buck on his hind legs nibbles on my honeysuckle while his mother watches.

Here’s a final bit of deer nomenclature for those still puzzled by the Golden Hind. The Encyclopedia Americana notes, “The male deer is usually called buck, but the male red deer of Europe is a stag, or when mature a hart. The female is called a hind or doe.”

After three decades of generally good relations between West Marin residents and the Point Reyes National Seashore, how did we end up with a park administration better suited to an autocracy than a democracy? Why does the general public now have only a perfunctory say when major park policies are set?

Frankly, the answer is politics, both Republican and Democratic.

Back in the 1970s, when the former program for managing the exotic-deer herds through culling was established, the public debated the alternatives, experts of various points of view spoke, and a consensus was reached to maintain the herds at 350 each. And where did all this happen? In public sessions of the Citizens Advisory Commission to the Golden Gate National Recreation Area and Point Reyes National Seashore.

Recognizing that the National Seashore and GGNRA were established to serve an urban population, Congress provided for local governments around the Bay Area to nominate most members of the commission, who then were appointed by the US Secretary of the Interior.

The commission required Congressional reauthorization every few years, and for almost three decades, Congress approved it. However, in 2002, its term expired, and with Republicans in charge of Congress and the White House, the commission was allowed to die.

“This time [then-Interior Secretary] Gale Norton (at right) and the Park Service said, ‘It’s been a very good commission for 29 years, but we don’t need it anymore,’” noted former Commissioner Amy Meyer in an interview I conducted for Marinwatch.

Meyer of San Francisco and Ed Wayburn spearheaded creation of the GGNRA during the Nixon Administration and served throughout the commission’s existence, along with Richard Bartke of El Cerrito, representative of the Association of Bay Area Governments.

“We had moved toward the sunset clause several times before,” Meyer noted. Each time the commission was about to expire, Congressman Phil Burton or his widow Sala, who replaced him in the House, would extend it for three to five years, she said. They “wanted to have an advisory commission.”

National Seashore Supt. Don Neubacher, however, did not want one. As park spokesman John Dell’Osso acknowledged to me in 2004, the park administration had found the commission sometimes interfering with what park staff felt should be done. The Neubacher administration has further argued that local residents don’t speak for all Americans. It’s a specious argument since most park visitors are from the nine-county Bay Area and because people here are far more familiar with the park than people in other parts of the country, who typically know little or nothing about it.

Congresswoman Lynn Woolsey (at right), who represents West Marin, did introduce legislation to resurrect the commission, and it was attached to a House bill being pushed by now-Speaker Nancy Pelosi and others to acquire land in San Mateo County for the GGNRA.

The bill passed in 2005, but when it did, the rider resurrecting the commission was gone. What happened?

Meyer said she and other people went to Congresswomen Pelosi (at left) and Woolsey and asked that they drop the advisory-commission legislation.

They feared, Meyer explained, that the Bush Administration would pack the advisory commission with people who share his ideology.

“Having no advisory commission is better than having a bad one,” Meyer added. “Gale Norton [who resigned last March] was a terrible Secretary of the Interior. No one wants to bring the commission back until ‘W’ is out of office.

Throughout its existence, Meyer said, the advisory commission was seldom politicized. When it comes to advising the Park Service, she said, “there is nothing worse than a politicized commission in being able to [fairly sort through] public desires.”

Former Commissioner Meyer isn’t necessarily against Neubacher’s plan to eliminate non-indigenous deer, but she said that in deciding what to do about the deer, or a ranger’s 2004 pepper-spraying scandal, or other matters, the commissioners could have been — as they once were — a crucial interface between the public and the Park Service.

While the commission was only “advisory,” commissioners’ decisions carried weight. “The advice they could give the Park Service,” Meyer noted, “could modify a policy.”

The local citizens advisory commission to the national parks was not the only one that has not been reauthorized despite the fact that “to make a park responsible to the people is very important,” she added. “It’s happening all over…. We have an administration that doesn’t believe in participatory democracy.

“We’re all sitting here waiting for 2008 [to see] if we have the right president who is going to appoint the right Interior Secretary. The president could be a Republican,” Meyer stressed. “Even Nixon had two of the best in history.”

In short, thanks to the power struggle in Washington, residents of West Marin and the rest of the Bay Area must remain frustrated for two more years.

For now, there is no effective forum for influencing National Seashore policy:

• When rangers run amok (e.g. extensively pepper-spraying innocent people who not surprisingly sue the Park Service and collect $50,000).

• When the National Seashore decides there’s money to be saved by slaughtering majestic deer that have long been a part of Point Reyes and are beloved by much of the public. Ironically, settling with the pepper-spray victims cost the Park Service far more than a year’s culling once did.

• When environmentally responsible mariculture is treated like a pariah.

Better days no doubt are coming to Point Reyes. In the meantime, here’s a Valentine’s Day heart from SparselySageAndTimely.com and a flock of Canada geese between my cabin and Inverness Ridge.

Fallow deer in the Point Reyes National Seashore range from white to spotted to black. Naturally gentle, they are among the few deer that can be easily domesticated, and they are widely raised for meat. The fallow herd was periodically culled by the park until Don Neubacher became superintendent in 1994. He stopped the culling and now claims the herd is becoming too large and must be totally eliminated. (Photo by Janine Warner)

West Marin residents need to start paying attention to how much the administration of the Point Reyes National Seashore has come to reflect ideologically rigid policies of the Bush Administration Park Service, not to mention the Bush Administration’s belligerent approach to Homeland Security.

Combativeness, ideological zeal, and indifference to public opinion are the hallmarks of this approach. At the National Seashore, it is taking the form of:

• A widely criticized program to slaughter the long-resident white and spotted deer from Asia, which much of the public finds enchanting, on grounds it would be cheaper to eliminate them than to control herd sizes with culling or contraception.

The only public hearing on the pogrom before the National Seashore administration last year approved it was so tightly controlled as to be meaningless. No general discussion, with public debate, was allowed. Supt. Don Neubacher assembled a panel of like-minded folks to present the administration’s point of view. Respected organizations that oppose slaughtering the deer, such as the Humane Society, were noticeably left off his panel.

These fallow deer (originally from the Near East) and axis deer (originally from India and Sri Lanka) have been a part of the Point Reyes ecosystem for 60 years, far longer than the Park Service. (Photo by Janine Warner)

Yet the Neubacher administration talks about the fallow deer as if the growth of its herd is out of control. No it isn’t. The Neubacher administration in 1994 merely stopped the park’s periodic culling.

The park administration in trying to rationalize the pogrom claims that because non-indigenous deer eat acorns and so do indigenous blacktail deer, the wellbeing of the blacktail is being threatened. The claim is typical of the pseudo-environmental malarkey we’ve come to expect from the Bush Interior Department that also claims opening up the Artic National Wildlife Refuge to oil drilling is environmentally necessary.

Blacktail deer are abundant throughout West Marin as this herd, including a doe who’s found one of my persimmons, bears witness.

There’s no shortage of blacktail deer in and around the park. Yes, a lot of them are dying on and off parkland here. And whose fault is that? Almost entirely motorists, many of whom are among two million visitors a year drawn to West Marin by the Point Reyes National Seashore.

• National Seashore Supt. Don Neubacher’s announced intention to close down the venerable Drake’s Bay Oyster Company when its lease expires in five years.

There may be ranches, not to mention a Coast Guard station, next door, but Neubacher claims the land around the oyster company’s waters is “potential” wilderness and that it would take an act of Congress to keep the oyster company open. If that’s true — and county officials are skeptical — then it’s Congresswoman Lynn Woolsey’s responsibility to take action in Congress.

Like the exotic deer, the oyster company has been on Point Reyes far longer than the park, which opened in 1965. Oyster growing has become part of the Drakes Estero ecoystem, and oysterman Kevin Lunny notes that because oysters filter water, the water is cleaner in his part of the estuary than where oyster growing has ended.

For many visitors to the National Seashore, buying oysters at the oyster company brings them far more pleasure than visitor centers, sandcastle contests, boarded-up ranch buildings, and the Morgan horse stable — not to denigrate any of them but merely to take note of the obvious.

I’ve never heard Lunny himself say this, but some ranchers on Point Reyes see Supt. Neubacher’s plans to close the oyster company as “payback time.”

They believe that Lunny, who is also a beef rancher, roused the superintendent’s ire two years ago when he helped organize the Point Reyes Seashore Ranchers Association so that ranchers in the park can collectively negotiate their leases with the National Seashore administration. Ranchers I’ve talked with say Neubacher (pictured) reacted bitterly to formation of their association.

One indication of the park administration’s attitude toward the association occurred a year ago when the National Seashore hired a “range ecologist.” No sooner had he arrived than he showed up at an association meeting to introduce himself, say he’d noticed some ranches had fences in need of repair, warned that he would give ranchers one notice to make repairs, and said if they didn’t then hop to it, he would seek to have their leases revoked. Dick Cheney couldn’t have said it better.

(Ironically the Jan. 30 San Francisco Chronicle described in detail the sorry state of Golden Gate National Recreation Area fencing at Crissy Beach. Neubacher administers, along with the National Seashore, part of the GGNRA but not the beach in San Francisco.)

One rancher, who doesn’t agree with the “payback” theory, instead believes the oyster grower’s problems began when Gordon Bennett, chairman of the Marin Unit of the San Francisco Bay Chapter of the national Sierra Club, got Neubacher’s ear by becoming part of the park superintendent’s kitchen cabinet. *

With Congress stalling on reviving the Citizens Advisory Commission to the Golden Gate National Recreation Area and Point Reyes National Seashore, the park superintendent has been able to cherry pick whom he listens to. Sometimes the arrangement reminds me of our government’s unstated alliance with the Taliban during the Soviet occupation of Afghanistan.
An environmental fundamentalist, Bennett is the loudest critic of Drakes Bay Oyster Company, which he considers equivalent to a 165-foot-high old Buddha in potentially Taliban-pure wilderness. The opposition of Bennett, who lives in Paradise Ranch Estates, to a popular oyster farm founded more than a century ago is perfectly in character.

A major stopover for birds migrating on the Pacific Flyway and a haven for harbor seals, seabirds, and long-legged wading birds, Bolinas Lagoon may completely fill with silt if its channel isn’t dredged and tidal circulation restored. The chairman of the Marin Unit of the San Francisco Bay Chapter of the Sierra Club opposes the necessary dredging.

When the nonprofit Marine Mammal Center needed to upgrade its treatment facilities on the Marin Headlands or when people around Bolinas Lagoon hoped to dredge silt from its channel before the lagoon becomes a meadow, Bennett was always there to lend a criticism.

* The term “kitchen cabinet” in its political sense originated in the 1820s during the presidency of Andrew Jackson. Jackson abandoned official cabinet meetings and instead took his advice from an informal, kitchen-table cabinet more to his liking. A number of these advisors, such as influential newspaper editors, were chosen because they had a pulpit for defending his policies.

Next week: Bringing the voice of democracy back to the Point Reyes National Seashore delayed by congressional Democrats’ distrust of Bush Administration.

Exotic rat at Point Reyes

This week I shot a rat. With my camera, that is. To be precise, I photographed a roof rat foraging under a flowerpot for stray birdseed. It was a lucky shot, for an instant after I snapped the picture, the rat was gone.

For 30 years, I have been aware of roof rats on this hill, for they have sometimes made themselves known in a particularly disruptive fashion.

It typically happens this way; every few years, a resident of Campolindo Drive turns on the dishwasher only to have soapy water spread across the kitchen floor. (If memory serves, it happened to my late neighbors Ben and Charlotte Glading twice, to my neighbors Dan and Mary Huntsman once, and to me twice.)

Inverness applicance repairman Dave Brast this week explained what’s been going on: “There’s one hose that drains a dishwasher, and usually it goes through a hole in the cabinet wall that separates the dishwasher nook from the space under the kitchen sink. If the sink drain goes through the wall under and behind the sink and if that hole is overly large for the drainpipe (thereby leaving a gap), a rodent can crawl from inside the wall through the gap into the under-sink space and then through the hole in the cabinet wall over to the dishwasher nook…”

(For roof rats to “enter homes and buildings,” The New York Times-owned website About.com notes, “they only need a hole the size of a quarter.”)

Brast further explained, “To do damage by gnawing through the dishwasher drain hose, the rodent can gnaw the portion of the hose under the sink or under or behind the dishwasher.

“I think the hose in the nook is the favorite target because there the rodent is completely protected from being disturbed by cats, dogs and humans….

“In the last few weeks I’ve had to repair two rat-gnawed dishwasher-drain hoses in Bolinas, one at the home of Aggie Murch and the other at the home of Charles and Veronique Fox. The two houses are on opposite sides of the road just a few hundred yards apart. The first gnawing was in the Murch house and days later in the Fox house.

“This made us wonder if it wasn’t the same rat doing the gnawing. After it gnawed through the first hose, it thought, “Well, no more to gnaw here at Murch’s. Guess I’ll mosey on over to Fox’s and see what there is to gnaw there…. Another dishwasher-hose gnawing I remember happened to Herb and Gina Kutchins’ [Inverness Park] dishwasher.”

Why do roof rats do this? “My understanding is that rodents gnaw because they have to,” Brast told me. “If they didn’t, the front teeth, which never stop growing, would get so long the animal wouldn’t be able to open its mouth wide enough to eat.” In short, it’s a dental procedure.

And there are more serious reasons for not wanting roof rats in our kitchens than periodically sudsy floors.

As reflected in their grating scientific name Rattus rattus, roof rats are notorious creatures. I’m reminded of Nabokov naming Lolita’s stepfather “Humbert Humbert” to emphasize that rat’s ugly nature.

“The roof rat… is an introduced species of rat [that is] native to southern Asia,” the University of Florida Institute of Food and Agricultural Science notes. (Florida has a particular problem with roof rats in citrus groves.) “It was brought to America on the first ships to reach the New World….

“The rat is the same species that carried the bubonic plague around the world [killing half the people in Europe during the late 1340s] and is also the host for murine typhus” in the South.

Cats kill roof rat “pups” but seldom the adults. Charlie cat seen here fence sitting belongs to neighbors Jay Haas and Didi Thompson, whose dishwasher has thus far escaped rat damage. Whether Charlie should get the credit, however, is unclear.

Because roof rats (which like to gnaw their way into attics) are arboreal — traveling along branches, utility lines, and fence tops — they seldom fall prey to cats except when the “pups” are young and still “dispersing,” the University of Florida notes.

Traps are more effective in controlling roof rats.

Hawks, such as this redtail on my hill, and owls (especially barn owls) are even better, the University of Florida reports.

A female roof rat can have as many as five litters a year of up to eight pups each. And each generation is ready to begin reproducing in three to four months.

For the past two centuries, rats have been a fact of life on every continent but Antarctica.

The so-called Norway rats or “sewer rats” (Rattus norvegicus) are actually native to northern China. They reached Europe and the Americas from Asia much later than roof rats. The University of Michigan Museum of Zoology reports they were inadvertently carried on ships to Europe in the early 1700s and the New World in the 1770s.

“In Asia, Rattus norvegicus was native to forests and brushy areas,” the museum notes. “Today, however, Norway rats find preferred habitat to be alongside the rapid expansion of the human population. Nearly every port city in the world has a substantial population of these rodents.”

I happened to have been reporting for the old San Francisco Examiner back in 1982-83 when the City of San Francisco reconditioned its cable car tracks and — while it was at it — replaced antiquated sewer lines underneath.

A supervising engineer on the sewer project told me at the time that he and another employee had recently gone into a sewer tunnel under Market Street at the edge of the Financial District. The tunnel opened into a large chamber, he said, and as the two of them shone their flashlights around the tiered vault, they saw reflections from eyes of hundreds of rats. The two men beat a hasty retreat. A typical city, the engineer noted, has one rat for every human.

In case you have your own encounter with a representative of the genus rattus and wonder just what species you’re dealing with, the easiest way to distinguish between Norway rats and roof rats is by the length of their tails.

Norway rat tails are shorter than their bodies while the tail of a roof rat is noticeably longer than its body. Norway rats have bald ears. The ears of roof rats are furry. Norway rats are only slightly longer than roof rats; in fact the rattus rattus above would probably measure more than a foot from the tip of its nose to the tip of its tail. In general, however, Norway rats are far heftier.

Flashing wildlife makes some nature photography possible that would otherwise be difficult at best. *

The results of flashing, however, can be gratifying or frustrating, depending on how one sees things. Flashes often give humans red eye, and I don’t mean conjunctivitis (AKA pink eye). In fact, possums are the species that end up with pink eye in flash photography. Blacktail deer come out with blue eye while raccoon eyes can end up white or green or both.

A blacktail fawn gets “blue eye,” not “red eye,” from being flashed.

(For the edification of readers in other parts of the country, I should note that flash photography can make prairie dog eyes look orange and alligator eyes look red.)

However, the reason flashes — which are often vital for photographing nocturnal wildlife — give these animals’ eyes their various colors is not the same reason flashes can make human eyes look red.

The eyeshine of possums is pink.

Among mammals, the iris of the eye expands and contracts to let in the optimum amount of light as conditions become darker or brighter. When a camera flashes, the human iris cannot contract fast enough to keep bright light from reaching the back of the eye; as a result, red blood vessels of the retina reflect light and show up in photos as “red eye.”

Unlike humans, many other mammals, especially nocturnal creatures, have a mirror-like surface, the tapetum lucidum, behind their retinas. The eyeshine of a deer caught in the headlights is a reflection off the tapetum lucidum.

The tapetum lucidum helps nocturnal animals hunt and forage in low light. Here’s how. Light from outside the eye passes through the iris and the retina and then bounces off the tapetum lucidum back through the retina. This magnifies the intensity of the light reaching the rods and cones of the retina, which are what sense light.

However, the color of the tapetum lucidum differs from species to species, which is why rabbits have orange or red eyeshine while dogs are often green or blue.

Showing both green and white eyeshine, a raccoon looks through my kitchen door at Nina Howard of Point Reyes Station.

Nor is having a tapetum lucidum an unmixed blessing. As Wikipedia notes, the tapetum lucidum “improves vision in low light conditions but can cause the perceived image to be blurry from the interference of the reflected light.”

And then there are other curiosities. The Minnesota Department of Natural Resources reports, “Animals in which the views of the two eyes overlap a lot — such as people and owls — have good stereoscopic vision [which helps them gauge distances]. Animals whose vision overlaps less — such as deer and rabbits — have less stereoscopic vision, but they can see more around them.”

Not all animals have round pupils like those of human eyes. In the same way we squint to see more clearly, some animals’ pupils are naturally narrow to sharpen their vision — perhaps somewhat offsetting any blurring their tapetum lucidum might cause.

The pupils of foxes and small cats, for example, are vertical slits, which help these predators notice when any prey is scurrying around off to their sides. The pupils of goats, sheep, and deer are horizontal slits, as can be seen in bright light; this gives them better vertical vision on steep terrain.

When I spotted a blacktail doe grazing in the shade of a pine tree outside my bedroom, I opened a window to take a picture. The doe looked up and saw me, but she appeared oblivious to being flashed and went back to grazing. Notice her horizontal pupils.

Surprisingly, wildlife including birds do not usually show any reaction to sporadic flashes — even those directly in their faces— but a quick succession of flashes gets their attention.

“By means of water, We [God] gave life to everything” — The Qur’an

My two acres adjoin the land of Point Reyes Station’s venerable Toby Giacomini, and one of the stockponds on his property is only 10 yards from our common fence. Living next to that pond for the last 30 years has been an education. Livestock such as cows and horses have long watered there, of course, but the stockpond also provides habitat for an amazing array of wildlife.

Red-winged blackbirds from a colony that nest at Toby’s Giacomini’s stockpond near my cabin flock in whenever I put out birdseed.

Threatened Western pond turtles have found refuge in Toby’s stockpond. The pond provides a home for newts, frogs, snakes, various fish, and a colorful colony of Red-winged blackbirds.