Chestnut-tipped toucanet explained

The chestnut-tipped toucanet (Aulacorhynchus derbianus) is a near-passerine bird in the toucan family Ramphastidae.^[1] It is found in Bolivia, Colombia, Ecuador, and Peru.^[2]

Taxonomy and systematics

The chestnut-tipped toucanet is monotypic.^[1] However, what is now the tepui toucanet (A. whitelianus) and it were for a time considered conspecific. They were separated by major taxonomic systems beginning in 2011.^{[3] [4] [5]} The chestnut-tipped and groove-billed toucanets (A. sulcatus) form a superspecies.^[6]

Description

The chestnut-tipped toucanet is 33to long and weighs 141to. Its bill is deep red and black with a vertical white line at its base and grooves on the maxilla. (Some individuals have an all-black bill). The sexes are alike. Their plumage is generally green, with a bluish nape, a white throat, and wide chestnut tips on the tail feathers. The red-brown eye has some blue below it.^[7]

Distribution and habitat

The chestnut-tipped toucanet is found along the east slope of the Andes from extreme southern Colombia through Ecuador and Peru into western Bolivia as far as Cochabamba Department. It primarily inhabits subtropical montane cloudforest, but also tropical forest in Bolivia. In elevation it mostly ranges between 600and.^[7]

Behavior

Movement

The chestnut-tipped toucanet is believed to be non-migratory.^[7]

Feeding

The chestnut-tipped toucanet forages mostly in the canopy, typically in pairs but occasionally in groups as large as 10 individuals. Its diet is not known in detail but appears to be mostly fruits and their seeds with some insects also taken.^[7]

Breeding

The chestnut-tipped toucanet's breeding season appears to be from May to October. Nothing else is known about its breeding biology.^[7]

Vocalization

The chestnut-tipped toucanet's song is an "often long series of grrrrump to kwuk notes", which pairs often sing together. It also makes "'ggg-rgg', 'ngg-ngg', and rattling 'bbdt-bbdt' notes."^[7]

Status

The IUCN has assessed the chestnut-tipped toucanet as being of Least Concern. It has a large range but its population size is not known and is believed to be decreasing. No immediate threats have been identified. It is considered common in some limited areas but overall uncommon to rare in Ecuador and rare in Peru.^[7]

Notes and References

1. Web site: Jacamars, puffbirds, barbets, toucans, honeyguides . IOC World Bird List . v 12.2 . Gill . F. . Donsker. D.. Rasmussen . P. . August 2022 . December 15, 2022 .
2. 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. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved July 24, 2022
3. Web site: Elisa Bonaccorso . Proposal (520) to South American Classification Committee: Recognize Aulacorhynchus [d.] whitelianus as a valid species distinct from A. derbianus ]. March 2012 . December 19, 2022.
4. et al. Bonaccorso . E. . 2011 . Molecular phylogeny and systematics of Neotropical toucanets in the genus Aulacorhynchus (Aves, Ramphastidae) . Zoologica Scripta . 40 . 4 . 336–349 . 10.1111/j.1463-6409.2011.00475.x .
5. Web site: SPECIES UPDATES – IOC Version 2.9 . . July 10, 2011 . International Ornithological Committee . December 19, 2022 .
6. 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 July 24, 2022
7. Short, L.L. and G. M. Kirwan (2020). Chestnut-tipped Toucanet (Aulacorhynchus derbianus), 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.chttou3.01 retrieved December 19, 2022