Black-hooded Sunbeam

Aglaeactis pamela

Unique and spectacular hummingbird of the upper humid montane forest in Bolivia. Plumage mostly black, with striking white feathers on breast and a shining blue rump. Occurs to, and sometimes just above, treeline on the east side of the Andes from western Santa Cruz department to La Paz. The only black hummingbird in its range. This species is generally patchily distributed, but can be locally common, especially where flowers are abundant.

Identification

The black-hooded sunbeam is about 12 cm (4.7 in) long including its 15 mm (0.59 in) straight black bill. Males weigh about 5.2 g (0.18 oz) and females 5.8 g (0.20 oz). The adult male is mostly purplish black, with glittering golden green to bluish green on the lower back and rump and a white tuft in the center of the breast. The tail is rufous with dusky tips to the feathers. Adult females are colored like the male but are duller overall and with less iridescent lower back and rump. Juveniles are somewhat browner than adults, with a reduced breast tuft and an olive cast to the tail.

Taxonomy

The black-hooded sunbeam is monotypic.

Scientific name
Aglaeactis pamela
Authority
(d'Orbigny, 1838)
Order
Apodiformes
Family
Trochilidae
Genus
Aglaeactis

Range and habitat

The black-hooded sunbeam is found only in the Andes of northern Bolivia, mainly in the departments of La Paz and Cochabamba. In elevation it mostly ranges between 2,500 and 4,200 m (8,200 and 13,800 ft) but there are records as low as 1,800 m (5,900 ft). It inhabits cloud forest and humid to semihumid montane scrublands.

Migration
Vertical migration

Behavior

The black-hooded sunbeam is believed to be sedentary but might make seasonal elevational movements.<p>The black-hooded sunbeam feeds primarily on nectar; it forages at all levels and clings to flowers to feed rather than hovering. It also feeds on small arthropods.<p>The black-hooded sunbeam's breeding season is thought to span from September to March. Its breeding phenology, nest, and eggs have not been described.<p>Though the black-hooded sunbeam's vocalizations are not well known, it has been reported giving a "high pitched zeet-zeet-zeet", and other calls during antagonistic encounters.

Conservation

Population trend
stable

Photos

Distribution

Bird Calls

Other Birds

Yellow Warbler

Yellow Warbler

Setophaga petechia

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Semipalmated Sandpiper

Semipalmated Sandpiper

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Black-faced Solitaire

Black-faced Solitaire

Myadestes melanops

Sleek medium-sized thrush with a beautiful voice. Listen for its fluty, ethereal phrases drifting over montane forests. Sexes alike: entirely gray with black face, black wings, and orangey bill and legs. Juveniles confusingly browner and spotted, but note similar shape, small bill, and dark face. Unobtrusive and not very active; most often seen while feeding at a fruiting tree.

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