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Eastern Long-tailed Hornbill - BirdForum Opus

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Photo by Tom Tarrant
Semuliki NP, Uganda, December 2005
Horizocerus cassini

Identification

70cm. A dark hornbill with a very long tail and a distinctive white crest

  • Body dark slaty to black with white tips to some wing feathers
  • Very long, graduated, black tail with white tip
  • Crest white and bushy, covering crown above the eyes and the nape
  • Face black
  • Skin at throat flesh-coloured
  • Bill and casque blackish
  • Eye pale, from milky white to greyish-blue

Females are smaller and have a shorter casque ridge. Juveniles have a smaller, greenish bill without casque.

Similar species

Western Long-tailed Hornbill has face mostly white.

Distribution

Africa: Nigeria to western Uganda and south to northern Angola

Taxonomy

White-crested Hornbill has been split into Eastern Long-tailed Hornbill and Western Long-tailed Hornbill.

This species was formerly placed in the genus Tockus or in Tropicranus.

Subspecies

This is a monotypic species[1].

Habitat

Mainly in tall forest or patches thereof, both primary and secondary. Found in canopy as well as in tangles in midstory.

Behaviour

Poorly known species. Seems to attend flocks of monkeys, ants or mixed bird flocks (at least part of the time) benefiting from capturing insects disturbed by them. In addition eating fruits, seeds and other small animals.

Vocalisation

A variety of sounds, mainly with a hollow character. No known difference from Western Long-tailed Hornbill.

References

  1. 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/
  2. Gill, F, D Donsker, and P Rasmussen (Eds). 2023. IOC World Bird List (v 13.2). Doi 10.14344/IOC.ML.13.2. http://www.worldbirdnames.org/
  3. Kirwan, G. M. and A. C. Kemp (2023). Eastern Long-tailed Hornbill (Horizocerus cassini), version 1.0. In Birds of the World (B. K. Keeney and N. D. Sly, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.whchor4.01

Recommended Citation

External Links

GSearch checked for 2020 platform.1

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