Sunday, March 30, 2008

Ixpanpajul

On Birdwatching Encounters in Guatemala, we see a lot of different places. Sometimes the travel time to get there unavoidably eats up the time we'd LOVE to be spending in birdwatching. Such was the case at Parque Nacional de Ixpanpajul, a historic Mayan site that boasts tramways and suspension bridges from which one can watch birds and other jungle life. We got there just at nightfall, and hurried down a shadowy trail to see what we could see before dinner. Warning: my photos are about as good as you'd expect for pictures taken, handheld, at 1600 ISO at nightfall. They suhhhhhk.

Right before the light died I got this picture of begonias growing along the trail, huge begonias, unknown and deathly exciting to a houseplant maven.A little oncidium orchid, fallen from high above, bloomed bravely on the forest floor.

Our guide was amazing. Not a word of English, but he saw every pajarito there was to see, way before we did, and he could whistle through a rolled tongue just like a tinamou or a laughing falcon. I was humbled by his presence, honored to be in his company. He was a woodsman, a rare one. One such pajarito was a red-capped manakin, and I was privileged to be standing beside Mike Bergin (of 10,000 Birds reknown) as he ticked that one off on his life list. If you ever get a chance to go birding with Mike, grab it! Bill and I are already trying to figure out how to enjoy his witty, warm and bright company again soon. He's a live one.Pity this manakin does not know how famous he is, being Mike Bergin's First Manakin and all. Manakins seem like the kind of birds that would enjoy being notorious.

The unidentified fluffy mass on the tree in this pathetic picture proved to be the nest of a lesser swallow-tailed swift, constructed of plant down and swift saliva. It had a tubular entrance pointing straight down. This is what's nice about having people like Steve Howell, author of Birds of Mexico, on one's trip! We'd never have known what it was otherwise. He's also a very fun guy. I wish I had had a chance to go birding with him, but life intervened.
An ivory-billed woodcreeper searched for insects. I love the fine pearls running over his shoulder and mantle.
The best was yet to come. Our guide hurried to get us to an archaeological site before it was completely dark. Scrambling up slick stone stairs, we were felled by the vision of a huge eye and nose emerging from jungle vegetation. Wow, wow, wow.
Tikal is cool, but it has nothing to compare to this for sheer grab-you-by-the-psyche impact.
photo by Jim McCormac

A lot went on in these jungles that we know almost nothing about. I'm currently reading 1491
by Charles C. Mann. It's about what native societies might have been up to before Columbus "discovered America." The author ranges from Massachusetts all the way to Guatemala and Bolivia, examining evidence that the "New World" was much older, better developed and much more densely populated than we have heretofore believed. It's fascinating, but dense, and I find my eyes swimming and head nodding each night as I try to wrap my mind around the concept.

Just looking into the Maya guide's eyes, getting a nonverbal dose of the volumes he knew about birds, was a lesson in humility. We prance around with our books and optics, but he knows. I'm sorry not to have a picture of him, but sometimes I feel awkward acting touristy around someone so learned. His ancestors built that face, now smothered in jungle.

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Sunday, March 23, 2008

Ivory-billed Birds

Thanks to the lush plantings, small clearings, hummingbird and fruit feeders that are carefully maintained, birds are EVERYWHERE at Los Tarrales. You can idle away hours in the garden, watching tanagers, orioles, thrushes, honeycreepers and even great fruit bats feeding at the bananas and grapefruit that are put out each morning for their enjoyment. It makes you want to run home and put oranges, grapefruit and bananas out for orioles. Except that they're still in Guatemala. But it is cool to think that our Baltimore orioles will recognize tropical fruits, because they might have encountered them on the wintering grounds. Western tanagers are everywhere. Here's a nice male, coming into spring plumage; i.e. getting an orange head:
Los Tarrales has some special birds, endemics that are found only in a limited area. The blue-tailed hummingbird is one. This is a lousy picture, but you can tell what it is, and get a hint of its beauty in better light. One of my favorite shots from Los Tarrales is this pair of male rose-breasted grosbeaks in a flowering tree. It's hard to find them, but they look so fine in that setting! (You have to know how frustrating it is for a Science Chimp to have to describe any plant as "a flowering tree.") Agghhh. Eee. Eee. They'll be at our feeders before you know it. I noticed that most of the male rose-breasts in Guatemala had very pale pink cravats. Perhaps some white feather edges have to wear off before they will be in full spring finery.

Woodcreepers are part of a large Neotropical family called the Dendrocolaptidae.  Most are variations on a theme of burnt sienna. Many have spine-tipped tails, like woodpeckers, but they're not generally as robustly built as woodpeckers, since they tend to probe and glean rather than hammer for their food. They're tame and easy to spot as they work the bark, mosses and epiphytes on forest tree trunks. One of the commonest is the ivory-billed woodcreeper, a nice hearty bird with a spine-tingling name. Long, flexible necks and a slightly decurved bill allow this IBWC to probe into forgotten crevices, looking for insect and invertebrate prey. It's always surprising to see the positions a bird can get into when it's foraging. If you're used to our robust woodpeckers, woodcreepers look kind of willowy and gracile in comparison, with fine legs, toes and bills, and soft fluffy plumage.
And speaking of ivory-bills, here is the tropical Campephilus that always raises the hair on the back of my neck with its double-raps and yapping calls--the pale-billed woodpecker. Ba-DOCK! Yip yip yip yip! I guess "Ivory-billed woodpecker" was already taken. I shot photo after photo as it hitched up the tree, its massive bill and flaming crest backlit by morning sun. Would that our Campephilus were so cooperative, but who can blame it for shunning the company of man?

I got an e-mailed response from Dr. Stephanie Doucet, Asst. Professor of Biology at the University of Windsor, Ontario, who answered from her field station in Costa Rica. I asked her about tail molt in long-tailed manakins. I was kind of embarrassed to have to ask her, because the manakin painting I showed you was on the cover of the issue of The Auk (the journal of the American Ornithologists' Union) that featured her awesome article about...molt in long-tailed manakins. As the cover artist, I was provided a copy, and I can't find it; it's probably swallowed in the bowels of my big wooden flatfile. Duh. She sent me a copy of her article, which is absolutely fascinating; she mist-netted and color-banded  1,315 long-tailed manakins to figure out what was going on with their plumage development. It takes young males FIVE YEARS to come into definitive adult plumage! And she figured out how to tell exactly how old a manakin was, up to age five, by its plumage. Obviously, manakins can tell, too, and the social implications of wearing your age like a badge are multitude. It all plays into that odd lek-based mating system, where social rank and age determine whether a bird can pass on its genes. Anyway, Stephanie was kind enough to write to say:

In answer to your question, they re-grow their central rectrices (tail feathers) each year,
and as they go from juvenal plumage to definitive adult plumage, their tails get longer every year.

So Katdoc, you were right--the older males just shed their feathers, then grow a new longer tail every year, like an older buck growing a new set of big antlers each summer. Think about that--I'm thrilled to see five or six manakins, and Dr. Doucet has banded over a thousand of them, keeping records on each one. There's interesting, and then there's amazing.

Hope you had a wonderful Easter. We did. Church, communion for 400? zzzzzz, two egg hunts, lamb gravy.

Liam: I LOVE that lamb gravy! Can I put it on my asparagus?
Me: Sure. Knock yourself out.
Liam: Suddenly, it doesn't look so appetizing.

Last night he said his bed didn't look so sleepitizing to him. That's my boy.

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