FIRST RECORD OF THE BROWN-HEADED COWBIRD PARASITIZING THE MANGROVE WARBLER IN BAJA CALIFORNIA SUR

Abstract

 In this paper we present the first record of parasitism by the Brown-headed Cowbird (Molothrus ater) on the Mangrove Warbler (Setophaga petechia castaneiceps), a subspecies of the Yellow Warbler endemic to Baja California Sur (Lowther 2020).