Chaetocercus Astreans

The Santa Marta woodstar (''Chaetocercus astreans'') is a species of hummingbird in tribe Mellisugini of subfamily Trochilinae, the "bee hummingbirds". It is endemic to Colombia.HBW and BirdLife International (2020) ''Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world'' Version 5. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v5_Dec20.zip xls zipped 1 MBretrieved 27 May 2021

Taxonomy and systematics

The Santa Marta woodstar and several other species in genus ''Chaetocercus'' were formerly placed in genus ''Acestrura''. In addition, it was for a time treated as a subspecies of the gorgeted woodstar (''C. heliodor''). It has been in its current position since the late 20th century. It is monotypic.

Description

The Santa Marta woodstar is about long. Both sexes have a straight black bill. The male's head is shiny green and the rest of the upperparts dark shiny bluish. It has a reddish gorget that extends across the neck. The breast is gray and the belly bluish with a white spot on the flanks. The tail is forked, with very short central feathers and outer ones that are bare shafts. The female is bronzy green above and pale cinnamon-rufous below with a dark cheek patch and, like the male, a white spot on the flanks. Its rounded tail has green central feathers and the rest are cinnamon with a black bar near the end.Züchner, T. and P. F. D. Boesman (2020). Santa Marta Woodstar (''Chaetocercus astreans''), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.samwoo2.01 retrieved July 26, 2022

Distribution and habitat

The Santa Marta woodstar is found only in the isolated Sierra Nevada de Santa Marta of northern Colombia. It inhabits the edges of montane forest, semi-open woodlands, and coffee plantations, and occasionally visits the lower parts of the ''páramo''. In elevation it ranges between .

Behavior

Movement

The Santa Marta woodstar's movements, if any, are not known but seasonal elevational changes are thought likely.

Feeding

The Santa Marta woodstar feeds on nectar and insects, though no details are known. It is assumed to have a foraging strategy and diet like those of its close relative the gorgeted woodstar. That species feeds from vegetation's middle strata to the canopy; one important source is the flowers of ''Inga'' trees. It does not defend feeding territories, and because of its small size and slow bumblebee-like flight is sometimes able to feed in the territories of other hummingbirds.

Breeding

Nothing is known about the Santa Marta woodstar's breeding phenology.

Vocalization

The Santa Marta woodstar's vocalizations have seldom been recorded. What is possibly its song is "a regularly repeated, single, modulated squeaky note." It makes "a series of single liquid 'tsit' notes or a doubled 'ti-tsit'" calls while hovering or feeding.

Status

The IUCN has assessed the Santa Marta woodstar as being of Least Concern. Though it has a limited range and its population size is unknown, the latter is believed to be stable. It is considered locally common and readily accepts some human-altered landscapes like coffee plantations, though some of its natural habitat is under threat of deforestation.

References

{{Taxonbar, from=Q1263655

Santa Marta woodstar
Birds of the Sierra Nevada de Santa Marta
Endemic birds of Colombia
Santa Marta woodstar
Taxonomy articles created by Polbot