Blackpoll Warbler in Cerro Azul, a report by Bill Adsett

Yesterday (Sunday) there was a male Blackpoll Warbler in non-breeding plumage at the house in Cerro Azul. The distinguishing features were lemon-yellow breast, otherwise white underparts (including tail); quite heavy dusky streaking on sides; yellowish eyebrow above dusky stripe through eye; crown and back olive green, heavily streaked dusky; white wingbars; no chestnut or buffy coloring on sides. It was subtly but clearly different from the non-breeding Bay-breasted warblers we are so familiar with. No photos, I'm afraid. I used Curson, Quinn and Beadle's New World Warblers to confirm the identification.