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Glow-throated Hummingbird Selasphorus ardens Scientific name definitions

F. Gary Stiles and Christopher J. Sharpe
Version: 1.0 — Published March 4, 2020
Text last updated September 16, 2016

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Introduction

Unfortunately, little information exists on this small Panamanian endemic. Classified as vulnerable due to its limited range, the Glow-throated Hummingbird is restricted to west central Panama and has been cited at only a few locations including the Serranía de Tabasará and potentially in the highlands of the Península de Azuero. During the 20th century, this species was only recorded in two areas: Cerro Colorado/Cerro Flores and Santa Fé/Cerro Tute. Although not officially documented, forest fragmentation in Serranía de Tabasará and elsewhere is suspected to be contributing to a decline in the population.


Little information about the bird’s basic biology exists other than it inhabits forest borders and clearings between 750-1800 meters. Males are bronze and green with a pinkish-red gorget bordered by a white collar on the front of the neck. Both sexes could possibly be confused with the Scintillant Hummingbird (Selasphorus sctintilla) but the Glow-throated exhibits a mostly black tail where the Scintillant Hummingbird’s is rufous with some black striping. The female Glow-throated is brighter below and has less rufous edging on the tail than does the Scintillant. Both sexes have short, black bills.

Field Identification

7 cm. Adult has short, straight, black bill. Male bronzy green above, rectrices black with rufous edgings and little emargination, outer primary attenuated; gorget pinkish red, set off by white collar across foreneck; centre of breast and belly white, rest of underparts buffy to cinnamon, spangled with green, undertail-coverts buffy white. Female similar but throat pale buff speckled greyish, central rectrices largely green, lateral rectrices rufous basally, with black subterminal band and deep buffy tips. Immature resembles adult female but has rusty fringes on feathers of crown and nape and more green on central two pairs of rectrices.

Systematics History

Probably closest to S. scintilla. Formerly considered closely related to S. flammula simoni. Monotypic.

Subspecies

Monotypic.

Distribution

Mountains of WC Panama (Ngöbe-Buglé and Veraguas).

Habitat

Clearings and forest borders at elevations of 750–1800 m.

Movement

No information.

Diet and Foraging

No information; presumably habits similar to those of S. scintilla.

Sounds and Vocal Behavior

No information.

Breeding

No information.

ENDANGERED. CITES II. Restricted-range species: present in Costa Rica and Panama Highlands EBA. Very poorly known, with no information on basic biology. Found in a handful of localities in Serranía de Tabasará, with 20th century records from only two areas: Cerro Colorado/Cerro Flores in E Chiriquí and Santa Fé/Cerro Tute in Veraguas, the first of which is unprotected. In Mar 1994 a hitherto unknown population thought to refer to this species was discovered in Cerro Hoya National Park, S Azuero Peninsula; however, a purported specimen has been lost, and sight records are unsatisfactory; until specimens can be obtained, records are best considered hypothetical (1). At best uncommon; global population estimated to be fewer than 1000 mature individuals BirdLife International (2016) Species factsheet: Selasphorus ardens. Downloaded from http://www.birdlife.org on 16/09/2016. . Part of known (or suspected) distribution of species is inaccessible and apparently largely undisturbed. However, Serranía de Tabasará generally threatened by subsistence agriculture, clearance for coffee plantations, cattle-grazing, pesticide contamination and burning. Deforestation continues apace in core of species’ range on Cerro Santiago, with forest in E Chiriquí increasingly fragmented BirdLife International (2016) Species factsheet: Selasphorus ardens. Downloaded from http://www.birdlife.org on 16/09/2016. . Panama Audubon Society is working with indigenous communities in Ngöbe-Buglé Comarca to achieve some degree of protection for remaining forests of Cerro Santiago region BirdLife International (2016) Species factsheet: Selasphorus ardens. Downloaded from http://www.birdlife.org on 16/09/2016. . Protected by 723 km² Santa Fé National Park, but the area lacks sufficient staff and adequate resources BirdLife International (2016) Species factsheet: Selasphorus ardens. Downloaded from http://www.birdlife.org on 16/09/2016. . Ecological requirements must be determined to accurately assess the species’ conservation status and design conservation action. Previously considered Vulnerable, it was uplisted to Endangered in 2013.

Distribution of the Glow-throated Hummingbird - Range Map
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  • Year-round
  • Migration
  • Breeding
  • Non-Breeding
Distribution of the Glow-throated Hummingbird

Recommended Citation

Stiles, F. G. and C. J. Sharpe (2020). Glow-throated Hummingbird (Selasphorus ardens), 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.glthum1.01
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