Peruvian sheartail

Peruvian sheartail
Thaumastura cora. Museum specimen
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Apodiformes
Family: Trochilidae
Genus: Thaumastura
Bonaparte, 1850
Species: T. cora
Binomial name
Thaumastura cora
(Lesson & Garnot, 1827)

The Peruvian sheartail (Thaumastura cora) is a species of hummingbird in the Trochilidae family.

Distribution

This species can be found in Peru west of the Andes and has been recorded in Ecuador. It has spread into northernmost Chile in recent decades.[2]

Habitat

Its natural habitats are lower slopes and semi-arid coastal zone of Andes, at an elevation up to 2,400 metres (7,900 ft) above sea level, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, subtropical or tropical high-altitude shrubland, and heavily degraded former forest.[2][3]

Description

Illustration from Voyage autour du monde - Antoine Germain Bevalet (1779–1850)

Thaumastura cora can reach a length of about 13 to 15 cm (5.1 to 5.9 in) in males (tail 7 cm), of about 7 to 7.5 cm (2.8 to 3.0 in) in females. These tiny hummingbirds have a greatly elongated tail streamers and a short and straight black bill. The basic color of the plumage is iridescent green, with a white or light gray belly and a iridescent rosy purple to turquoise throat.[2][4]

The weight of this species is reportedly 2 to 2.5 g (0.071 to 0.088 oz), with an average mass of approximately 2.2 g (0.078 oz), which makes it one of the lightest birds alive. It seems to be the lightest known birds species found in South America, although other extremely diminutive South American hummingbirds, i.e. woodstars from the genera Myrmia and Chaetocercus based upon their tiny total lengths, may rival them but have no published weights.[3][5][6]

Distribution map of Thaumastura cora

Biology

These hummingbirds feed on ectar of flowering cacti, shrubs and trees (Russelia, Melocactus, Cordia and Malvaceae species).[2]

Bibliography

References

  1. BirdLife International (2012). "Thaumastura cora". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
  2. 1 2 3 4 Handbook of the birds of the world
  3. 1 2 Schulenberg, T.S.; Stotz, D.F.; Lane, D.F.; O'Neill, J.P.; Parker, T.A.; Egg, A.B. (2010). Birds of Peru: Revised and Updated Edition. Princeton University Press. p. 250. ISBN 9781400834495. Retrieved 13 April 2015.
  4. Neotropican birds
  5. Schuchmann, K.L. & Boesman, P. (2016). Peruvian Sheartail (Thaumastura cora). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
  6. CRC Handbook of Avian Body Masses, 2nd Edition by John B. Dunning Jr. (Editor). CRC Press (2008), ISBN 978-1-4200-6444-5.


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