Sunday, May 6, 2012
Wilson (1996) warns, however, that evidence for this intrebreeding is based on very few specimens and that "studies on the interactions of the two subspecies are needed."
Identifying the races of Palm Warblers may be more difficult than some books suggest. Chris Wood, of the Cornell Laboratory of Ornithology, writes "There is alarge amount of variation in both Western and Yellow Palm Warblers and the extent of yellow on the underparts is particularly variable in spring. A fair number of Western Palm Warblers are [extensively] yellow below. I would look more at the color of the nape and wings, which would be more strongly olive in Yellow Palm Warbler. The back of the auricular should be more yellowish, or at the very least a bit more olive. Yellow Palms also should show... extensive chestnut streaking on the sides of the breast ..."
Posted by Dan Tallman at 10:12 AM