tags: Cliff Swallow, Petrochelidon pyrrhonota, birds, mystery bird, bird ID quiz
[Mystery birds] Cliff Swallow, Petrochelidon pyrrhonota, photographed at Attwater Refuge, Texas. [I will identify this bird for you tomorrow]
Image: Joseph Kennedy, 30 May 2009 [larger view].
Nikon D200 ,Kowa 883 telescope with TSN-PZ camera eyepiece 1/350s f/8.0 at 1000.0mm iso400.
Please name at least one field mark that supports your identification.
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I'm going with juvenile cliff swallow, based on the nestling fluff and yellow gape (for the "juvenile" part); the "pale rump" (to narrow it down to cliff or cave swallow); and the "dark throat" and "dark auriculars" (to distinguish from the cave swallow) (quotes from Sibley).