Bare-legged owl

The bare-legged owl (Margarobyas lawrencii), also called the Cuban bare-legged owl or Cuban screech owl, is a species of owl in the family Strigidae that is endemic to Cuba and Isla de la Juventud. It belongs to the monotypic genus Margarobyas.

Bare-legged owl

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Strigiformes
Family: Strigidae
Genus: Margarobyas
Olson & Suarez, 2008
Species:
M. lawrencii
Binomial name
Margarobyas lawrencii
Synonyms

Gymnasio lawrencii
Otus lawrencii
Gymnoglaux lawrencii

Taxonomy and etymology

The bare-legged owl was described in 1800 and for a time, it was considered the same species as the Puerto Rican owl. However, it was later determined to be its own species by George Newbold Lawrence in 1868. It has variously been placed in the genera "Noctua", Gymnoglaux, and Gymnasio. The American Ornithological Society moved it to the genus Otus in 1998. However, in 2003, they moved the bird back to the genus Gymnoglaux based on physical and vocal differences between the bare-legged owl and typical screech-owls. Finally, in 2013, the genus Margarobyas was proposed.

There is one possible subspecies: M. l. exsul, found in western Cuba and the Isla de Juventud. It is supposedly differentiated by a darker brown color and more spots, although this subspecies is not generally recognized.

Margarobyas comes from the Greek margarites, a pearl, and byas, an owl. This name was given as a reference to Cuba's status as the "Pearl of the Antilles." The species name, lawrencii, is in honor of George Lawrence.[2]

Description

The bare-legged owl is relatively small, measuring 20-23 cm (8-9 inches) long, and weighing about 80 grams (2.8 ounces). Its name comes from its featherless green-yellow legs, similar to those of the burrowing owl. [3] These owls have dark brown eyes, no ear tufts, a cream-colored facial disk, and brown rictal bristles. The upperparts of these birds are largely brown to slightly rufous in colour. Their wing feathers have white barring, and there are white spots on their shoulder and scapular feathers. The underparts are gray- to yellow-white, with some brown streaking and occasionally even cross-barring on the sides and breast.

Juvenile bare-legged owls have similar plumage colors to adults, but have fewer white spots.[2]

Biology

The natural habitats of the bare-legged owl are dry forests, lowland moist forests, and heavily degraded former forest. It particularly prefers stands of palm trees. Most of its foraging is done on the ground, and it is strictly nocturnal.[2] The bare-legged owl eats primarily insects and other arthropods. It will less frequently eat frogs, snakes, and occasionally small birds.[3]

These birds are secondary cavity nesters, requiring either woodpecker holes (particularly in palm trees) or natural openings in trees or rock crevices. Not much is known of their breeding ecology, but breeding season is January to June. The average clutch size is two eggs, which are incubated by the female owl.[2]

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References
  1. BirdLife International (2016). "Margarobyas lawrencii". IUCN Red List of Threatened Species. 2016: e.T22688883A93210507. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688883A93210507.en.
  2. Weidensaul, Scott (2015). Peterson Reference Guide to Owls of North America and the Caribbean. Houghton Mifflin Harcourt. p. 99-101.
  3. Mikkola, Heimo (2014). Owls of the World: A Photographic Guide. Firefly Books Ltd. p. 252.
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