Clay-colored thrush (Turdus grayi), also commonly referred to as the clay‑colored robin, is a species of passerine bird in the family Turdidae. It is native to the mountainous regions of Central America, where it inhabits humid forested environments.
Taxonomy
- Kingdom: Animalia
- Phylum: Chordata
- Class: Aves
- Order: Passeriformes
- Family: Turdidae
- Genus: Turdus
- Species: T. grayi
The species was first described by the American ornithologist Robert Ridgway in 1887. It belongs to the genus Turdus, which includes a variety of thrushes and robins worldwide.
Description
The clay-colored thrush measures approximately 23–26 cm (9–10 in) in length and weighs 80–110 g. Adults possess an overall plumage that is a uniform dull brownish‑gray to clay hue, giving the species its common name. The head, back, and upperparts are a muted brown, while the underparts are slightly paler with a subtle warm tint. The bill is medium‑sized, straight, and dark, and the legs are pinkish to light brown. Both sexes exhibit similar coloration, and juveniles are generally duller with streaked underparts.
Distribution and Habitat
The species ranges from southern Mexico through Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and into western Panama. It is primarily a montane bird, occupying elevations between 1,200 and 2,800 m (4,000–9,200 ft). Preferred habitats include:
- Moist cloud forests
- Subtropical and tropical montane forests
- Forest edges and clearings with dense understory
The bird is generally non‑migratory, though some local altitudinal movements have been noted in response to seasonal changes in food availability.
Behavior and Ecology
Diet: The clay-colored thrush is omnivorous, feeding on a mixture of insects, other arthropods, berries, and small fruits. Foraging typically occurs on or near the ground, where the bird probes leaf litter and low vegetation.
Breeding: Nesting season varies across its range but commonly occurs during the local rainy season. The nest is a cup-shaped structure constructed of moss, twigs, and grasses, placed on a low branch or within a shrub. Clutch size usually consists of two to three eggs, which are pale with brown spots. Both parents participate in incubation and feeding of nestlings.
Vocalizations: Its song consists of a series of melodious, clear notes, often delivered from a perch within the forest interior. Calls are sharp and thin, used for territorial and alarm purposes.
Conservation Status
The International Union for Conservation of Nature (IUCN) lists the clay-colored thrush as Least Concern due to its relatively wide distribution and stable population trends. No major widespread threats have been identified, although localized habitat loss from deforestation and forest fragmentation could affect certain populations.
References
- BirdLife International. (2022). Turdus grayi. The IUCN Red List of Threatened Species 2022.
- Ridgway, R. (1887). Descriptions of new species of birds from Central America. Proceedings of the United States National Museum.
- Stiles, F. G., & Skutch, A. F. (1989). A Guide to the Birds of Costa Rica. Cornell University Press.
- Cornell Lab of Ornithology. (2023). Clay-colored Thrush (Turdus grayi). Birds of the World.
This entry reflects current, verifiable information on the species known as the clay-colored thrush.