Black Jacobin
Florisuga fusca
The black jacobin is 12 to 13 cm (4.7 to 5.1 in) long. Males weigh about 9 g (0.32 oz) and females 8 g (0.28 oz). Adults of both sexes are mostly black, with a bronzy-olive lower back and uppertail- and wing-coverts. The flanks are white, the inner rectrices black, and the outer rectrices white with black tips. Juveniles are dark except for a wide cinnamon band on the center and sides of the throat and a white belly and outer rectrices. Voice: The black jacobin's song is "a series of high-pitched hissing notes above 10 kHz, 'szee..szee....szee..szee..szee....szee...'." Its calls include "a short 'tsik' or 'chik', and a short trill 'tr-r-r'."
ID text from Wikipedia, CC BY-SA 4.0
White-necked Jacobin
Florisuga mellivora
The white-necked jacobin is 11 to 12 cm (4.3 to 4.7 in) long. Males weigh 7.4 to 9.0 g (0.26 to 0.32 oz) and females 6.0 to 9.2 g (0.21 to 0.32 oz). The male is unmistakable with its dark blue head and chest and white belly and tail; the tail feathers have black tips. A white band on the nape separates the blue head from the bright green back and long uppertail coverts. Females are highly variable, and may resemble adult or immature males. Most females have green upperparts, a blue-green throat and breast with white "scales", a white belly, and a mostly green tail with a blue end.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Black Jacobin and White-necked Jacobin.