Leiothrix

Leiothrix is a genus of Old World passerine birds in the family Leiothrichidae. The genus currently contains two species. The most well-known member is the Red-billed Leiothrix, Leiothrix lutea, which is native to the Himalayan region and Southeast Asia. This species has also been introduced to various parts of the world, including Europe and Japan, where it has established breeding populations. The other species in the genus is the Japanese Bush Warbler, Leiothrix akahige, which is endemic to Japan.

These birds are typically small to medium-sized, with slender bodies and relatively long tails. They are characterized by their generally drab plumage, often with olive-green or brownish upperparts and paler undersides. However, the Red-billed Leiothrix is notable for its bright yellow throat and breast, and a distinctive red bill, which gives it its common name. The Japanese Bush Warbler, while also possessing a plain appearance, has subtle differences in its coloration.

Leiothrix species are primarily insectivorous, feeding on insects, spiders, and other small invertebrates. They are often found foraging in dense undergrowth, thickets, and shrubbery, where they can be somewhat secretive. Their songs are often described as musical and varied, with the Red-billed Leiothrix being particularly known for its melodious vocalizations. They typically inhabit forests, woodlands, and scrublands, often preferring areas with good cover. Breeding usually involves the construction of cup-shaped nests, and both parents participate in raising the young.