Balsas screech owl

Balsas screech owl
CITES Appendix II (CITES)[2]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Strigiformes
Family: Strigidae
Genus: Megascops
Species:
M. seductus
Binomial name
Megascops seductus
(Moore, RT, 1941)
Synonyms

Otus seductus R. T. Moore, 1941

The Balsas screech owl (Megascops seductus) is a species of owl in the family Strigidae. It is endemic to Mexico.[3]

Taxonomy and systematics

The Balsas screech owl is monotypic.[3]

Description

The Balsas screech owl is among the larger members of genus Megascops; it is 24 to 27 cm (9.4 to 10.6 in) long and weighs between 150 and 174 g (5.3 and 6.1 oz). Its facial disc is grayish brown with brownish markings and a darker border. Its "ear" tufts are short. The crown and upperparts are also grayish brown; the crown has darker streaks and the upperparts have a pinkish blush and dark streaks and other marks. The closed wing shows two bands of whitish spots. The underparts are paler than the upperparts and have narrow dark streaks and faint vermiculation.[4]

Distribution and habitat

The Balsas screech owl is endemic to interior southwestern Mexico. Its range is centered on the valley of the Balsas River from southern Jalisco southeast into central Guerrero. It inhabits arid open and semi-open areas such as deciduous woodland with cactus, thorn forest, and secondary forest. It can also be found in tropical scrublands and the edges of cultivated areas. In elevation it ranges from 600 to 1,500 m (2,000 to 4,900 ft).[4]

Behavior

Feeding

Like most other screech owls, the Basas screech owl is nocturnal. Its hunting methods have not been described, but its diet apparently includes insects, other arthropods, and small vertebrates.[4]

Breeding

Very little is known about the Balsas screech owl's breeding phenology. It is assumed to nest in cavities in trees and cacti like others of its genus.[4]

Vocalization

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

Songs and calls
Listen to Balsas screech owl on xeno-canto

Both sexes of the Balsas screech owl perform a territorial song described as "a rather loud series of gruff notes accelerating to a trill ('bouncing-ball' rhythm), book-book-bokbokbobobobrrrrr". A possible courtship song is "a series of gruff, screaming 'whinny' trills".[4]

Status

The IUCN has assessed the Balsas screech owl as being of Least Concern. Until 2014 it had been considered Near Threatened. However, its population is unknown and is suspected to be in decline due to habitat loss and degradation.[1]

References

  1. ^ a b BirdLife International. (2021). "Megascops seductus". IUCN Red List of Threatened Species. 2021: e.T22724664A167847049. doi:10.2305/IUCN.UK.2021-3.RLTS.T22724664A167847049.en.
  2. ^ "Appendices | CITES". cites.org. Retrieved January 14, 2022.
  3. ^ a b Gill, F.; Donsker, D.; Rasmussen, P. (July 2021). "IOC World Bird List (v 11.2)". Retrieved July 14, 2021.
  4. ^ a b c d e Egan, S. (2020). Balsas Screech-Owl (Megascops seductus), version 1.0. In Birds of the World (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.basowl.01 retrieved August 4, 2021