Rufous-backed dwarf kingfisher

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Rufous-backed dwarf kingfisher
Rufous-backed Dwarf-Kingfisher 0A2A6720.jpg
On the island of Java in Indonesia
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Coraciiformes
Family: Alcedinidae
Subfamily: Alcedininae
Genus: Ceyx
Species:
C. rufidorsa
Binomial name
Ceyx rufidorsa
Strickland, 1847

The rufous-backed dwarf kingfisher (Ceyx rufidorsa) is a small bird in the kingfisher family Alcedinidae that is found in parts of Maritime Southeast Asia. It was formerly considered to be conspecific with the black-backed dwarf kingfisher and together the two taxa were known by the English name "oriental dwarf kingfisher".

This tropical kingfisher is easily distinguishable from other birds in its range due to its red bill, yellow-orange underparts, lilac-rufous upperparts, and rufous back. It resides in lowland forests, typically near streams or ponds, where it feeds upon insects, spiders, worms, crabs, fish, frogs, and lizards.

Taxonomy

The rufous-backed dwarf kingfisher was formally described in 1847 by the English naturalist Hugh Edwin Strickland under the current binomial name Ceyx rufidorsa. He specified the type locality as Malacca at the southern end of the Malay Peninsula. [2] The specific epithet combines Latin rufus meaning "rufous" with dorsus meaning "back". [3]

The rufous-backed dwarf kingfisher was formerly considered to be a colour morph of the black-backed dwarf kingfisher (Ceyx erithaca). The two species complex was known as the "oriental dwarf kingfisher". Molecular genetic studies have shown that Ceyx rufidorsa is a distinct taxon and that the polymorphism is the result of ancient introgression in which some genes from Ceyx erithaca were transferred to Ceyx rufidorsa around 140,000 years ago. [4] [5]

Five subspecies are recognised: [6]

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References

  1. ↑ BirdLife International (2023). "Ceyx rufidorsa". IUCN Red List of Threatened Species . 2016: e.T22683144A227717722. doi: 10.2305/IUCN.UK.2023-1.RLTS.T22683144A227717722.en . Retrieved 5 January 2023.
  2. ↑ Strickland, Hugh Edwin (1847). "Notes on several species of birds from Malacca". Proceedings of the Zoological Society of London. 14 (165): 99-105 [99-100].
  3. ↑ Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 341. ISBN   978-1-4081-2501-4.
  4. ↑ Lim, H.C.; Sheldon, F.H.; Moyle, R.G. (2010). "Extensive color polymorphism in the southeast Asian oriental dwarf kingfisher Ceyx erithaca: a result of gene flow during population divergence?". Journal of Avian Biology. 41 (3): 305–318. doi:10.1111/j.1600-048X.2009.04913.x.
  5. ↑ Shakya, S.B.; Alexander, A.; Lim, H.C.; Manthey, J.D.; Prawiradilaga, D.; Chan, K.O.; Sheldon, F.H.; Moyle, R.G. (2023). "Demographic history of a complex polymorphism in populations of the Oriental Dwarf Kingfisher (Ceyx erithaca/rufidorsa) of Southeast Asia". Ibis. 165 (4): 1267–1279. doi:10.1111/ibi.13207.
  6. ↑ Gill, Frank; Donsker, David, eds. (December 2023). "Rollers, ground rollers & kingfishers". World Bird List Version 14.1. International Ornithologists' Union. Retrieved 5 January 2024.
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