The Yellow Warbler (Dendroica petechia) is a New World warbler. It is the most widespread Dendroica warbler, breeding in almost the whole of North America and down to northern South America. Shown here is a member of the aestiva group of subspecies, which average about 11.5 cm (4.5 in) in length and 9 g (0.32 oz) in mass.Photo credit: Mdf
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