Scaly Ground-Roller

Geobiastes squamiger

Chunky, long-legged, intricately patterned bird. Pale blue tail tips are conspicuous in flight. Elusive and uncommon; unlikely to be seen by those not searching for it. Found at low and middle elevations in eastern rainforest. Feeds in the understory, avoiding disturbance by fleeing on the ground. Song is a long “bwooooop” note that is repeated slowly, delivered from a low perch.

Identification

The scaly ground roller (Geobiastes squamiger) is a species of bird in a monotypic genus in the near-passerine family Brachypteraciidae. It is endemic to eastern Madagascar. Its natural habitat is subtropical or tropical moist lowland forest. The scaly ground roller is found at elevations below 1,000 meters (3,300 ft), and one of the few birds of Madagascar to reside in lowland rainforest.

Taxonomy

This species taxon has been referred to by several other synonymous names until recently, including the following binomial names:<p>Until the 2000s, the taxon was called Brachypteracias squamigera, in the genus Brachypteracias. The scaly ground roller, Geobiastes squamiger, is in the monotypic genus Geobiastes, however was originally placed in the genus Brachypteracias in 1838 by Frédéric de Lafresnaye. The species was moved to Geobiastes to reflect its unclear phylogenetic relationship with the sister taxon to its family Brachypteraciidae, Brachypteracias leptosomus. The scaly ground roller also has a different tarsometatarsus to hallux measurement ratio compared to the genera Brachypteracias, Uratelornis, and Atelornis, where the scaly ground roller has a smaller ratio (2.8) compared to the other genera (4.5). An enlarged tarsometatarsus may be a derived character in the family Brachypteraciidae.

Scientific name
Geobiastes squamiger
Authority
(Lafresnaye, 1838)
Order
Coraciiformes
Family
Brachypteraciidae
Genus
Geobiastes

Range and habitat

Migration
Resident species

Behavior

Migration pattern: Resident species.

Conservation

Population trend: declining.

Population trend
declining

Photos

Distribution

Bird Calls

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