Colibrí ventriblanco

Identificación

The white-vented plumeleteer is 10.5 to 12 cm (4.1 to 4.7 in) long. Males weigh 6 to 7.3 g (0.21 to 0.26 oz) and females 5.9 to 7.9 g (0.21 to 0.28 oz). All of the subspecies except intermedia have a black bill and black feet; that one has a pinkish base to the mandible and pale pink to red feet. <p>Males of the nominate subspecies C. b. buffonii have mostly dark metallic green upperparts with a bronzy tinge to the crown and coppery bronze uppertail coverts. Their upper breast is bluish, lower breast bright metallic green, the lower belly whitish, and the undertail coverts long and white. Their tail is blue-black with a bronze gloss on the central feathers. Nominate females are paler metallic green above and gray below with green speckles on the side. Their tail is like the males' with the addition of dull gray tips on the outer feathers.<p>Subspecies C. b. micans is larger than the nominate. Males' central tail feathers are a deeper blue and females' undersides are a clearer gray. C. b. aeneicauda males are a more golden-green below than the nominate and their central tail feathers are bright bronze-green to copper-bronze. Females have pale gray underparts with sparse green flecks. C. b. caeruleogaster is the largest subspecies. The male has a bluish green throat and belly and a blue breast. Females have gray underparts with no flecking. C. b. intermedia males have a greenish-blue breast, a gray belly, and a dark blue tail.

Taxonomía

Most taxonomic systems assign five subspecies to the white-vented plumeleteer: <p>However, BirdLife International's Handbook of the Birds of the World (HBW) assigns C. b. intermedia as a subspecies of bronze-tailed plumeleteer (C. urochrysia).<p>Both C. b. caeruleogaster and C. b. intermedia have at times been proposed as separate species.

Nombre científico

Chalybura buffonii

Autoridad

(Lesson, RP, 1832)

Orden

Caprimulgiformes

Familia

Trochilidae

Género

Chalybura

Distribución y hábitat

The subspecies of white-vented plumeleteer are distributed thus:<p>The white-vented plumeleteer inhabits a variety of landscapes including the edges and interiors of dry, moist, and wet forests, semi-open woodlands, secondary forest, and scrublands. The subspecies differ somewhat in their requirements; only caeruleogaster and sometimes buffonii frequent the interior of wet forest. In elevation the species ranges from sea level to as high as 2,000 m (6,600 ft).

Migración

Resident species

Comportamiento

The white-vented plumeleteer is not known to migrate or make seasonal movements.<p>The white-vented plumeleteer forages for nectar at a wide variety of flowering plants from the understory almost to the canopy. It mostly forages by trap-lining, visiting a circuit of flowers, but also aggressively defends rich patches. In addition to nectar it catches small arthropods by hawking from a perch, hovering, and hover-gleaning from vegetation and spider webs.<p>The white-vented plumeleteer's breeding seasons vary across its range, including September in Panama, February to August in the Magdalena valley, June to November in the Eastern Andes, and perhaps year-round in parts of Venezuela. Its nest is a cup of plant down bound with spiderweb with moss and lichen on the outside. Nests have been found on tree branches as high as 2.5 m (8 ft) above the ground. The only nest that was closely monitored held two eggs and its single hatchling fledged in 21 days.<p>The white-vented plumeleteer's song has not been described in words, but it is known to make "chip" notes while foraging.

Conservación

Tendencia poblacional

declining