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READ ME: I'M NEW! With six years of phd work on theropod dinosaurs behind him, Darren Naish mostly spends long, happy hours in the library, hunched over his laptop. But he gets out sometimes, and picks up litter and pursues exotic lizards across the British countryside, aiming all the while to publish his technical work on obscure Cretaceous dinosaurs. He also messes around with pterosaurs, swimming giraffes, British big cats and stuff like that. He has given up on the stupid idea of being a dedicated academic and ekes out a living as a technical consultant, editor and author. He can be contacted intermittently at eotyrannus (at) gmail dot com. For more biographical info go here.

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« Tet Zoo picture of the day # 9 | Main | Peter Hocking's big cats: where are you now? »

Tet Zoo picture of the day # 10

Category: ornithologypicture of the day
Posted on: June 4, 2007 4:19 AM, by Darren Naish

Chinese%20goose.jpg

A Chinese goose: the domesticated form of the Swan goose Anser cygnoides (that's right, more than one species of goose has been domesticated: this was always assumed based on morphological features, but was confirmed genetically in a 2006 study [abstract here]). The Swan goose is also the ancestor of the domesticated African goose. Wild swan geese are native to eastern Russia, China and Korea (they used to occur on Japan, but haven't been recorded there since the 1970s, except as rare winter visitors) and have declined severely since the 1950s due to loss of floodplain habitat and human hunting. All domestic forms of the Swan goose have a particularly big bill knob compared to the wild forms, and it is bigger in males than females. This individual is a male. The twists, turns and blind alleys of the Swan goose vagina were studied in the highly-acclaimed recent paper by Brennan et al. (2007), available free here: I would have blogged about it, but I was busy with turtle genitals at the time.

Comments

OK, I looked at that picture, and my immediate thought was, "Honk!". ;-)

Posted by: David Harmon | June 4, 2007 11:33 AM

There is another domestic species of goose - white-fronted goose (Anser albifrons). At least, one extremely rare breed of this goose, Pskov bald goose (from Russia) is known.

Posted by: Paul I. Volkov | June 4, 2007 11:52 AM

We've got one of these in my local park, he went around with the canada geese in winter but they rejected him in spring so the poor fella (i think its a male) now wnaders round on his lonesome. Still very noisy though! I remeber being told on a school trip to a farm there used as guard-geese, as if anyone came to close you'd hear them honk. But judging by the aggressive nature of chinese and canada geese and the height of their heads I'd be more worried about getting a hard peck in a sensitive area!

Posted by: Neil | June 5, 2007 6:36 PM

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