The spot-throated hummingbird (''Thaumasius taczanowskii'') is a species of

hummingbird Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With about 361 species and 113 genera, they occur from Alaska to Tierra del Fuego, but the vast majority of the species are found in the tropics aro ...

in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to Peru but there are uncorroborated sightings in Ecuador.Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 July 2022. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved July 24, 2022

Taxonomy and systematics

The spot-throated hummingbird was formerly placed in the genus '' Leucippus''. A

molecular phylogenetic Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

study published in 2014 found that ''Leucippus'' was polyphyletic. To resolve the polyphyly the spot-throated hummingbird and the Tumbes hummingbird (''Thaumasius baeri'') were eventually moved by most taxonomic systems to the resurrected genus '' Thaumasius''.Clements, J. F., P.C. Rasmussen, T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, A. Spencer, S. M. Billerman, B. L. Sullivan, and C. L. Wood. 2023. The eBird/Clements checklist of birds of the world: v2023. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ retrieved October 28, 2023HBW and BirdLife International (2023). Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 8. Available at: https://datazone.birdlife.org/species/taxonomy retrieved December 28, 2023 The spot-throated hummingbird is monotypic.

Description

The spot-throated hummingbird is long and weighs about . The sexes are essentially alike. They have a somewhat decurved black bill, though sometimes the mandible is gray-brown or even yellow with a black tip. Their upperparts are grayish green to bronze green with a bronze crown and uppertail

coverts A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or ''tectrices''), which, as the name implies, cover other feathers. The coverts help to smooth airflow over the wings and tail. Ear coverts The ear coverts are sm ...

. Their inner tail feathers are grayish green to bronze green that progresses to grayish on the outer ones, which also have a bronze band near the end. Their underparts are drab gray with golden green speckles on the chin, throat, and flanks. The undertail coverts have pale brown centers and whitish edges.Schulenberg, T. S. and C. W. Sedgwick (2021). Spot-throated Hummingbird (''Thaumasius taczanowskii''), version 1.1. In Birds of the World (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.spthum2.01.1 retrieved July 20, 2024

Distribution and habitat

The spot-throated hummingbird is generally considered to occur only in Peru, on the west slope of the Andes and the Marañon River valley from near the Ecuadorean border south to Ancash Department. Undocumented sight records in far southern Ecuador lead the South American Classification Committee of the American Ornithological Society to list it as hypothetical in that country. It inhabits arid scrublands and the edges of deciduous forest. In elevation in the Andes it mostly occurs between but is found locally as low as . In the Marañon valley it occurs between .

Behavior

Movement

The movements of the spot-throated hummingbird, if any, have not been documented.

Feeding

The spot-throated hummingbird forages for nectar from the understory to the mid-strata. Though details of the flowering plants it favors are lacking, it is known to feed at '' Inga'' trees, '' Agave'', and banana ('' Musa''). In addition to nectar, it feeds on small arthropods caught on the wing.

Breeding

The spot-throated hummingbird's nest and eggs remained undescribed until 2024. The description's authors examined specimens that had apparently been collected in the late 1800s and preserved in the Natural History Museum of Berlin. The nest is a small cup of plant fibers, seeds, and thin twigs with plant fragments at its base and lined with plant down and other plant material. Photographs of a nest taken in January 2016 show an external covering of lichens. The single 1800s egg was white without other markings. The 2016 photograph includes a female on the nest; a photograph of a nest with two eggs was taken in November 2007. These data indicate a breeding season that includes at least November to January. The incubation period and time to fledging remain unknown.

Vocalization

The spot-throated hummingbird's song is "a complex series of chips and wheezing electric warbles." It also makes "a dry chatter and ''tip'' notes."

Status

The

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

has assessed the spot-throated hummingbird as being of Least Concern. It has a fairly large range; its population size is unknown but is believed to be stable. No immediate threats have been identified. It is considered fairly common, and " man activity has little effect on Spot-throated Hummingbird, at least in the short term".

References

{{Taxonbar, from=Q1260889 spot-throated hummingbird Birds of the Peruvian Andes Endemic birds of Peru spot-throated hummingbird spot-throated hummingbird Taxonomy articles created by Polbot