White-necked Jacobin

Large and attractive hummingbird that ranges from Mexico south to Peru, Bolivia and south Brazil. The approximately 12 cm long male White-necked Jacobin is unmistakable with its white belly and tail, a white band on the nape and a dark blue hood. Immature males have less white in the tail and a conspicuous rufous patch in the malar region. Females are highly variable, and may resemble adult or immature males, have green upperparts, white belly, white-scaled green or blue throat, and white-scaled dark blue crissum, or be intermediate between the aforementioned plumages, though retain the white-scaled dark blue crissum. Females are potentially confusing, but the pattern on the crissum is distinctive and not shared by superficially similar species.