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The most common species, the white-bearded helmetcrest, measures 11.4 cm (4.5 in) in length, it is a small hummingbird with a very small 8 mm (0.31 in) bill. The adult male has a distinctive pointed black crest and a shaggy white beard. The face and cheeks are blackish, rendering a triangular shape with the white fronted crest and white beard.
The black-chinned hummingbird is 8.25 cm (3.25 in) long. Adults are metallic green above and white below with green flanks. Their bill is long, straight and slender. The adult male has a black face and chin, a glossy purple gorget, and a dark forked tail. The female has a dark rounded tail with white tips and no throat patch.
The white-bearded helmetcrest is about 11.5 cm (4.5 in) long and weighs about 4.8 g (0.17 oz). It has a short straight bill. The adult male has a long black and white crest and a mostly black face with a wide white "collar". Its upperparts are bronzy green with a slight gray scaly appearance. It has a long thin white "beard".
The black-bellied hummingbird is 7 to 8 cm (2.8 to 3.1 in) long and weighs about 3.0 to 3.5 g (0.11 to 0.12 oz). Males have a black breast and belly that provide the species' English name; their forehead and face are also black. The sides of the breast are green and the undertail coverts white. They have mostly bronze green upperparts with ...
Xantus's hummingbird is 8.5 to 9.5 cm (3.3 to 3.7 in) long. Males weigh an average of 3.5 g (0.12 oz) and females 3.4 g (0.12 oz). Their bills are straight and about 1.7 cm (0.67 in) long; males' are red with a black tip. Females' maxilla is black with a pinkish base and their mandible pinkish red with a black tip.
The face is black. The chin and throat vary widely from pale grayish buff to cinnamon tones and lack the male's tufts. The breast is metallic bronze, the belly white with metallic bronze spots, and the undertail coverts cinnamon rufous. Its maxilla is black and the mandible red with a dark tip. [5]
Broad-tailed hummingbird. Order: Apodiformes Family: Trochilidae. Hummingbirds are small birds capable of hovering in mid-air due to the rapid flapping of their wings. They are the only birds that can fly backwards. Black-chinned hummingbird, Archilochus alexandri (R) Calliope hummingbird, Selasphorus calliope (PP) Rufous hummingbird ...
White-tailed hummingbird: Eupherusa poliocerca Elliot, DG, 1871: 308 Oaxaca hummingbird: Eupherusa cyanophrys Rowley, JS & Orr, 1964: 309 Stripe-tailed hummingbird: Eupherusa eximia (Delattre, 1843) 310 Black-bellied hummingbird: Eupherusa nigriventris Lawrence, 1868: 311 Scaly-breasted hummingbird: Phaeochroa cuvierii (Delattre & Bourcier ...