Tuesday, October 9, 2012
Click on picture(s) for a larger view.
Solution by Tony Leukering
[I apologize for the tardiness in getting the recent solutions posted, but I am currently working in Texas away from Internet access, so I'm getting to them as I can.]
This quiz bird's tail shape takes us to the square-tailed doves, as we can eliminate pigeons from consideration by the extensive white tail tip. Thus, our choices are Eurasian Collared-Dove, White-winged Dove, Spotted Dove, and White-tipped Dove. Spotted Dove can be quickly eliminated by that species' tawny-pink underparts. White-tipped Dove is a shorter, squatter bird with a very short tail, unlike that of our quiz bird. Differentiating Eurasian Collared-Dove and White-winged Dove is an under-appreciated ID problem, in my opinion, hence this quiz.
Eurasian Collared-Dove's tail pattern is well-known as an ID point, but some often forget that it is useful in differentiating it from African Collared-Dove. However, its tail pattern is surprisingly similar to that of White-winged Dove: blackish base, extensive white tip. Additionally, in certain postures, White-winged Dove can appear to have Eurasian Collared-Dove's black extension down the outer web of the outermost tail feather. But, our quiz bird's blue facial skin and orange iris confirm it as a White-winged Dove. The apparent Eurasian Collared-Dove tail pattern is created by the bird's right r5 (fifth rectrix on right) peeking out from behind its right r6. I took this picture of a White-winged Dove in Pueblo, Pueblo Co., CO, on 25 January 2012.
Incorrect species provided as answers:
Eurasian Collared-Dove - 1
Congratulations to the 18 of 19 getting the quiz correct:
Answer: White-winged Dove