Snowy-bellied hummingbird

Snowy-bellied hummingbird
In Mount Totumas cloud forest, Panama
Images show how 'color' of feathers changes with lighting
CITES Appendix II (CITES)[2]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Clade: Strisores
Order: Apodiformes
Family: Trochilidae
Genus: Saucerottia
Species:
S. edward
Binomial name
Saucerottia edward
(Delattre & Bourcier, 1846)
Range of S. edward
Synonyms

Amazilia edward[3]

The snowy-bellied hummingbird (Saucerottia edward), also known as snowy-breasted hummingbird, is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in mostly in Costa Rica and Panama with a few records in Colombia.[4][3][5]

Taxonomy and systematics

The snowy-bellied hummingbird was formerly placed in the genus Amazilia. A molecular phylogenetic study published in 2014 found that the genus Amazilia was polyphyletic. In the revised classification to create monophyletic genera, the snowy-bellied hummingbird was moved by most taxonomic systems to the resurrected genus Saucerottia.[6][7][4][8][9] However, BirdLife International's Handbook of the Birds of the World retains it in Amazilia.[3]

The snowy-bellied hummingbird has these four subspecies:[4]

Subspecies S. e. niveoventer has been suggested as a separate species based on the color of its tail but this treatment has not gained acceptance.[10]

Description

The snowy-bellied hummingbird is 8 to 11 cm (3.1 to 4.3 in) long. Males weigh 5 to 5.4 g (0.18 to 0.19 oz) and females 4.3 to 5.2 g (0.15 to 0.18 oz). Both sexes of all subspecies have a straight blackish bill whose mandible has a reddish base. Adult males of the nominate subspecies S. e. edward have bronze-green upperparts that are especially coppery in the back and rump. Their tail is bronze to coppery and sometimes has a purple sheen. Their throat and chest are glittering golden green, the belly has a V-shaped white center, and the undertail coverts are rufous. Adult females are similar to males but with a less intense green on their upperparts, a more whitish throat and undertail coverts, and light green tips on the outer tail feathers.[10]

Subspecies S. e. niveoventer is slightly larger than the nominate and its tail is bluish black to purplish black. S. e. collata has less contrast between the green and copper of the back than the nominate and brownish undertail coverts. S. e. margaritarum has paler undertail coverts than the nominate and a bronze to bronze-green tail.[10]

Distribution and habitat

The subspecies of snowy-bellied hummingbird are found thus:[4][10]

  • S. e. niveoventer, from southwestern Costa Rica into western and central Panama including Coiba Island
  • S. e. edward, Panama from the Canal Zone east into Darién Province with at least one record in northwestern Colombia's Chocó Department[11]
  • S. e. collata, central Panama
  • S. e. margaritarum, Panama: southwestern Darién, the Pearl Islands, and other islands in the Gulf of Panama

The snowy-bellied hummingbird inhabits different landscapes across its distribution. In Costa Rica and western Panama it favors semi-open areas such as savanna, scrublands with scattered trees, edges and clearings of primary forest, secondary forest, coffee plantations, and gardens. In elevation it ranges from sea level to 1,600 m (5,200 ft). S. e. collata inhabits fields with low herbs and bushes at elevations between 500 and 850 m (1,600 and 2,800 ft). On islands, S. e. margaritarum inhabits semi-open to open landscapes like abandoned fields and also mangroves; on the mainland it is found in rainforest. In elevation it ranges between sea level and 700 m (2,300 ft).[10]

Behavior

Movement

The snowy-bellied hummingbird appears to be mostly sedentary. It does make local movements from arid areas in the wet season to more humid ones in the dry season. It also appears to move in response to availability of flowers.[10]

Feeding

The snowy-bellied hummingbird forages for nectar at a wide variety of native and introduced plants, shrubs, and trees. It usually feeds between about 3 and 6 m (10 and 20 ft) of the ground. It sometimes defends feeding territories. In addition to nectar, it feeds on small arthropods captured by hawking from a perch and by gleaning from foliage.[10]

Breeding

The western populations of snowy-bellied hummingbird breed between September and January with most nesting in December and January. The nest is a cup of downy fibers with lichens and moss on the outside. It is typically placed on a branch or in a fork of a bush or small tree up to 9 m (30 ft) above the ground. The female incubates the clutch of two eggs; the incubation period and time to fledging are unknown.[10]

Vocalization

The snowy-bellied hummingbird's song is "a soft 'bebeebee, d’beebee' or 'tseer tir tir'." It also makes "tip" or "tsip" calls.[10]

Status

The IUCN has assessed the snowy-bellied hummingbird as being of Least Concern. It has a large range and a population of at least 50,000 mature individuals that is believed to be stable. No immediate threats have been identified.[1] It is considered locally common to common in most of its range including the islands, though it is uncommon in eastern Panama.[10]

References

  1. ^ a b BirdLife International (2021). "Snowy-bellied Hummingbird Amazilia edward". IUCN Red List of Threatened Species. 2021. Retrieved 7 September 2022.
  2. ^ "Appendices | CITES". cites.org. Retrieved 14 January 2022.
  3. ^ a b c HBW and BirdLife International (2021) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip retrieved 7 August 2022
  4. ^ a b c d Gill, F.; Donsker, D.; Rasmussen, P., eds. (August 2022). "Hummingbirds". IOC World Bird List. v 12.2. Retrieved 9 August 2022.
  5. ^ 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. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved 24 July 2022
  6. ^ McGuire, J.; Witt, C.; Remsen, J.V.; Corl, A.; Rabosky, D.; Altshuler, D.; Dudley, R. (2014). "Molecular phylogenetics and the diversification of hummingbirds". Current Biology. 24 (8): 910–916. doi:10.1016/j.cub.2014.03.016. PMID 24704078.
  7. ^ Stiles, F.G.; Remsen, J.V. Jr.; Mcguire, J.A. (2017). "The generic classification of the Trochilini (Aves: Trochilidae): Reconciling taxonomy with phylogeny". Zootaxa. 4353 (3): 401–424. doi:10.11646/zootaxa.4353.3. PMID 29245495.
  8. ^ "Check-list of North and Middle American Birds". American Ornithological Society. August 2022. Retrieved 9 August 2022.
  9. ^ Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ Retrieved 25 August 2021
  10. ^ a b c d e f g h i j Weller, A.A. (2021). Snowy-bellied Hummingbird (Saucerottia edward), version 1.1. 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.snbhum1.01.1 retrieved 7 September 2022
  11. ^ Colorado, G.J.; Pulgarín, P.C. (2003). "Snowy-bellied Hummingbird Saucerottia edward, new to Colombia and South America". Cotinga. 20: 99–101.

Additional reading

Angehr, George R.; Dean, Robert (2010). The Birds of Panama. Ithaca: Zona Tropical/Comstock/Cornell University Press. p. 150. ISBN 978-0-8014-7674-7.

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