Basileuterus culicivorus
The Golden-Crowned Warbler is a common ground-dwelling warbler with a substantial distribution ranging from Northern Mexico to Argentina. They occupy a broad swath of mid-to-low elevation humid and semi-humid forested areas, and due to this large but not entirely contiguous range there is a substantial amount of geographic variation within the species. The variation is visually noticeable in varying degrees of thickness and brightness in the head patterning between populations, but there is also an observable difference in song.
