Mystery Bird: American Avocet chick, Recurvirostra americana

tags: , , , ,


[Mystery bird] American Avocet chick, Recurvirostra americana, photographed in Arizona. [I will identify this bird for you tomorrow]
Image: Richard Ditch, 2007 [larger view].

Date Time Original: 2007:06:01 18:52:32
Exposure Time: 1/159
F-Number: 7.10
ISO: 200
Please name at least one field mark that supports your identification.


Rick Wright, Managing Director of WINGS Birding Tours Worldwide, writes:
This bird’s downy plumage may not identify it to species, but it leaves no doubt that we are dealing with a very young bird — a chick, in fact. The long legs and bill, and the fact that it is standing in water, tells us that this is a shorebird.
Adult shorebirds are best identified by shape and structure, and the same goes for their young. The legs and feet of this bird are long and noticeably stout, with a thick ankle joint. The bill is very strange: relatively massive at the base, then tapering quickly to a fine and ever so slightly upturned tip. That last character puts us onto the correct identification, one that a quick examination of the bird’s plumage confirms.
Note the three dark “stripes” on the upperparts; compare that with the wing pattern of a fledged American Avocet. The hint of warm cinnamon on the side of the neck also presages the rusty neck of a juvenile avocet.
Review all mystery birds to date.

Advertisements

About GrrlScientist

grrlscientist is the pseudonym of an evolutionary biologist and ornithologist who writes about evolution, ethology, and ecology, especially in birds. After earning a degree in microbiology (thesis focus: virology) and working at the Fred Hutchinson Cancer Research Center in Seattle, she earned her PhD in zoology from the University of Washington in Seattle, where she studied the molecular correlates of testosterone and behaviour in white-crowned sparrows. She then worked a Chapman Postdoctoral Fellow at the American Museum of Natural History in New York City, where she studied the speciation and distribution of lories and other parrots throughout the South Pacific Islands. A discarded scientist, she returned to her roots: writing. Formerly hosted by The Guardian (UK), she now writes about science for Forbes and for the non-profit think tank, the Evolution Institute and she writes podcasts for BirdNote Radio. An avid lifelong birder and aviculturist, she lives with a flock of songbirds and parrots somewhere in Germany.
This entry was posted in Birding, Mystery Birds and tagged , , , , , , , , , , . Bookmark the permalink.

0 Responses to Mystery Bird: American Avocet chick, Recurvirostra americana

  1. Steve Duncan says:

    I’ll go with American Avocet chick because of the slightly recurved bill. The dark line behind the eye is just visible as well.

  2. Hilary says:

    I’m inclined toward Greater Yellowlegs – curve in bill also applies, and the legs are, well, yellow.

  3. Ian Kinman says:

    My guess is a very juvenile American Avocet. I note the pink colour on the neck, the relatively long legs, and the slightly decurved bill. Also, given that it was taken in Arizona, I cannot think of any other wader with the same basic shape in that range.

  4. Paulette says:

    I’ve never seen a Yellowlegs chick but that would be my guess. I’m guessing the leg coloring is important. The fact that the bill is quite stout at the base probably means it has a way to grow. Therefore, I’m going with Hilary and saying Greater Yellowlegs.

  5. Firebyrd says:

    I also vote American Avocet chick, because of the other things mentioned as well as the orange coming in on the neck.

  6. Ian "Birdbooker" Paulsen says:

    HI ALL:
    If you’re interested in learning more about identifying chicks of North American birds consult:
    A Guide to the Nests, Eggs, and Nestlings of North American Birds (2nd edition) by Paul J. Baicich and Colin J.O. Harrison.
    FYI: Greater Yellowlegs DON’T breed in Arizona!

  7. Fran Wood (male) says:

    Clearly this is a newly hatched youngster in Arizona. Both Yellowlegs breed only in northern Canada and Alaska according to Dennis Paulson’s shorebird books and the National Geographic Guide, while the Avocet “breeds throughout the west–south throuogh Mexican Plateau”. It must be an Avocet!

  8. Fran Wood (male) says:

    This is obviously a newly hatched shorebird in Arizona. According to Dennis Paulson’s shorebird books and the National Geographic Guide, both Yellowlegs breed in northern Canada and Alaska. The Avocet, on the other hand, “breeds throughout the west–south through the Mexican Plateau”. This must be an Avocet!