After a thorough search of the literature, the identity of a mystery warbler seen by Delicia and Darién Montañez and Olmedo Miró whilst on the PAS fieldtrip to Isla Escudo de Veraguas has been changed from the very tentative first guesses (weird Cape May Warbler? Nashville x Palm Warbler hybrid?) to something that is exactly halfway between the most common warbler in the country and a new warbler for the country: a new subspecies of bird for Panama. Our bird was clearly a warbler, with a Dendroica -esque jizz. Its crown, cheeks and back were dull gray, contrasting with the olive scapulars, coverts and tail. The only markings on the face were a thin white incomplete eye-ring and a very faint black post-ocular stripe, for an effect similar to a female Mourning Warbler. The throat was white, the chest and belly were yellowish, and the undertail coverts were bright lemon yellow. But what really caught our eyes were the sharp, thin chestnut streaks that covered this warbler's throat, ch...
