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Posted by Joel Wilcox on 09:09:50 09/28/13
Woodment was very slow this AM (nothing new there), but there was an odd Blackburnian: Top half was typically male, including the large white area on the wings, though the yellow-orange on the head was somewhat pale. The breast, though, was bright yellow with very well-defined black stripes, so that it looked like a Prairie from underneath. There was no sharp boundary between head color and breast color.
Also, the yellow around the vent area was much larger and brighter than appears in The Warbler Guide (p. 166). The black edging on the tail matched the Blackburnian tail in TWG (p. 114), rather than the Prairie. Finally, the undertail coverts were Blackburnian-white.
Does anyone know if these two species hybridize? Or, alternatively, are the unusual breast markings and breast/vent color within normal variation for Blackburnians?
Thanks JW
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