Monday, February 20, 2012

Quiz #438 (2012-1-08) Solution


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Solution by Tony Leukering

Half of the respondents to this week's quiz submitted the right species, the other half split their answers among eight species, a sure sign that the photo made for a difficult quiz. For a view such as provided in the picture, I find birders tend to identify on impression, which can be amazingly accurate... but which can take a birder quite astray. For such a view, careful study on a feature-by-feature basis may confirm or reject that first impression; perhaps a scope view would serve for confirming such study.

This distant quiz bird is perched in a conifer (of the cedar/cypress/juniper ilk) in somewhat low light, so we'll have to look carefully at it. As noted by most respondents, the bird appears "flycatchery," with its bill not too long, not too short, not too thick, not too thin (apparently, it's juuusstt right), though it could be a large warbler (note the size relative to the conifer parts). Though I can see the following features on the image as is, enlargement makes the various important characters more obvious: gray upperparts that are apparently unmarked, a vague pale wing bar created by pale fringes to one row or another of the coverts, pale fringes to the tertials, a white patch on throat and below eye that is distinctly set off from a vague black mask or eyeline and the rest of the gray head, gray chest of about the same tone as the upperparts, and yellowish on the belly; the poorly-lit tail simply looks dark.

While we might consider a variety of flycatcher options, the kingbirds is really the only group hosting species matching most of these features. Once there, the combination of characters noted reduces our options to one. I took this picture of a Cassin's Kingbird at Goleta, Santa Barbara Co., CA, on 28 February 2009. With the recent re-arrangement of the leader board, our resident Brit, Peter Wilkinson, holds sole possession of first place with 8 of 8 this quarter (and year) that will see 12 quizzes.

Incorrect species provided as answers:
Gray Jay - 1
Western Kingbird - 5
Yellow-rumped Warbler - 3
Grace's Warbler - 1
Vermilion Flycatcher - 1
Sage Sparrow - 1
Eastern Phoebe - 1
Willow Flycatcher - 1

Congratulations to the 14 of 28 getting the quiz correct:
Chris Warren
Logan Kahle
Christian Nunes
Nick Komar
Jeff Witters
Thomas Hall
Ben Coulter
Aaron Brees
Bill Blackburn
Robert McNab
Devich Farbotnik
Peter Wilkinson
Joe Bens
James Kopitzke

Answer: Cassin's Kingbird

Monday, February 13, 2012

Quiz #437 (2012-1-07) Solution


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Solution by Tony Leukering

Many respondents may have considered this quiz pretty simple, though it didn't turn out that way. The picture's focus is on the very large, long-winged bird coming right at us. All respondents got to pelican and most noted the brown wings and pale belly of an immature Brown Pelican. Note also that the innermost remiges (seen on the bird's right wing) are dark, not white. Unfortunately, five respondents quit there; at least, five submitted only one species in their answers. There is another bird in the picture and I here repeat part of Rule #4:

"Should an individual quiz present multiple species, only those persons responding with all correct identifications AND with no incorrect identifications will get credit for a correct answer for purposes of the competition."

Yes, the second bird is not in focus and is quite distant, but it is certainly identifiable. The hint of orange-red on the bill, the brown wing coverts, blackish wingtips, whitish rump, whitish trailing edge to the secondaries, and the all-dark tail are the key features that identify this subadult Heermann's Gull. American Oystercatcher has white in the wing, but it is at the bases of the remiges, not the tips. Additionally, that species has blacker wings, a white-based tail, and a longer bill. I took this picture of youngsters of both Brown Pelican and Heermann's Gull off San Diego, San Diego Co., CA, on 8 October 2011.

Incorrect species provided as answers:
American Oystercatcher - 5
American White Pelican - 1

Congratulations to the 16 of 27 getting the quiz correct:
Thomas Hall
Bill Blackburn
Devich Farbotnik
Christian Nunes
Tyler Bell
Nick Komar
Aaron Brees
Robert McNab
Peter Wilkinson
Logan Kahle
Chris Warren
Su Snyder
Bryan Guarente
Joe Bens
Joel Such
Marcel Such

Answer: Brown Pelican, Heermann's Gull