Tawny-browed owl

Tawny-browed owl
Tawny-browed Owl adult at Serra da Cantareira state park, São Paulo state, Brazil
Tawny-browed Owl subadult at Serra do Mar state park, São Luiz do Paraitinga, São Paulo state, Brazil
CITES Appendix II (CITES)[2]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Strigiformes
Family: Strigidae
Genus: Pulsatrix
Species:
P. koeniswaldiana
Binomial name
Pulsatrix koeniswaldiana

The tawny-browed owl (Pulsatrix koeniswaldiana) is a species of owl in the family Strigidae. It is found in Argentina, Brazil, and Paraguay.[3]

Taxonomy and systematics

The tawny-browed owl may form a superspecies with band-bellied owl (Pulsatrix melanota). It has been suggested that they are conspecific but they have different morphology and vocalizations. It is monotypic.[4][3]

Description

The tawny-browed owl is about 44 cm (17 in) long. Males weigh 405 to 562 g (14.3 to 19.8 oz) and females 331 to 670 g (11.7 to 23.6 oz). It has a brown facial disk surrounded by ochre, a white chin patch, and creamy "brows" over chestnut-brown eyes. Its breast, upperparts, and tail are dark chocolate brown, and the tail has white bars. The belly is buff and the rest of the underparts are light ochre. The juvenile is initially almost entirely white and gradually attains adult plumage over several years.[5]

Distribution and habitat

The tawny-browed owl is found in Brazil from Espírito Santo state south to northern Rio Grande do Sul and the immediately adjacent areas of eastern Paraguay and northeastern Argentina. It inhabits humid tropical forest, open woodland, and forest dominated by Araucaria evergreens. In elevation it ranges from sea level to about 1,500 m (4,900 ft).[5]

Behavior

Feeding

The tawny-browed owl is nocturnal. It hunts in the canopy from a perch, taking small mammals, birds, large insects, and probably other small vertebrates.[5]

Breeding

The tawny-browed owl's breeding phenology has been poorly studied. Its nesting season has not been determined. The clutch size is usually two, laid in a tree cavity, and incubated by the female. Both parents care for fledged young.[5]

Vocalization

Dickcissel male perched on a metal pole singing, with neck stretched and beak open.

Songs and calls
Listen to tawny-browed owl on xeno-canto

The male tawny-browed owl makes a "[l]ow, descending sequence of guttural, ventriloquial 'brrr brrr brrr brrr' or 'ut ut ut ut ut' notes, accelerating and weaker at [the] end", to which the female responds with a higher pitched call.[5]

Status

The IUCN has assessed the tawny-browed owl as being of Least Concern.[1] Its population size has not been determined, and it is thought to be "relatively rare, or at best uncommon". It occurs in some protected areas, but its Atlantic Forest habitat has been much reduced and fragmented.[5]

References

Wikimedia Commons has media related to Pulsatrix koeniswaldiana.
  1. ^ a b BirdLife International (2018). "Tawny-browed Owl Pulsatrix koeniswaldiana". IUCN Red List of Threatened Species. 2018. Retrieved 7 September 2021.
  2. ^ "Appendices | CITES". cites.org. Retrieved 2022-01-14.
  3. ^ a b Gill, F.; Donsker, D.; Rasmussen, P. (July 2021). "IOC World Bird List (v 11.2)". Retrieved July 14, 2021.
  4. ^ 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 August 2021. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved August 24, 2021
  5. ^ a b c d e f Holt, D. W., R. Berkley, C. Deppe, P. L. Enríquez, J. L. Petersen, J. L. Rangel Salazar, K. P. Segars, K. L. Wood, E. de Juana, and J. S. Marks (2020). Tawny-browed Owl (Pulsatrix koeniswaldiana), 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.tabowl1.01 retrieved September 7, 2021.

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