Chestnut-vented Nuthatch

The Chestnut-vented Nuthatch, scientifically known as Sitta nagaensis, is a medium-sized bird within the nuthatch family Sittidae. It boasts a length ranging from 12.5 to 14 centimeters. The bird's upperparts are cloaked in a solid gray-blue, while a distinct black loral stripe adorns its face. The underparts transition from a uniform gray to buff across the throat and belly, culminating in brick red flanks. A white undertail with a rufous border completes its striking appearance.

Identification Tips

When identifying the Chestnut-vented Nuthatch, look for its blue-gray upperparts and the pronounced black stripe through the eye. The underparts are pale gray to buff, with the flanks a vivid brick red. The white undertail with a rufous edge is also distinctive. Males and females are similar, but the male's rear flanks are a deeper red compared to the female's rufous flanks.

Habitat

This species is predominantly found in evergreen and pine forests, but it can also inhabit mixed or deciduous forests. It thrives in subtropical or tropical moist lowland forests and montane forests.

Distribution

The Chestnut-vented Nuthatch is distributed across the northeast of India, parts of Tibet, south-central China, eastern Myanmar, and northwestern Thailand. Isolated populations reside in southern Laos and Vietnam. Its altitudinal range varies but typically spans from 915 to 4,570 meters.

Behaviour

The Chestnut-vented Nuthatch is often seen alone or in pairs, and outside the breeding season, it may join mixed-species foraging flocks. It is known to forage on the ground, rocks, old stumps, and trees.

Song & Calls

This nuthatch is known for its diverse calls, including squeaky "sit" or "sit-sit" sounds and a trill reminiscent of a troglodyte alarm. Its song is a monotonous, stereotypical crackle, often described as "chichichichi."

Breeding

Breeding season varies by region but typically occurs from March to May. The nest is usually situated in a tree hole, and the clutch consists of two to five eggs, which are white with red dots on a mottled reddish-purple background.

Similar Species

The Chestnut-vented Nuthatch can be confused with the Burmese Nuthatch or the Eurasian Nuthatch in areas where their ranges overlap. However, it can be distinguished by its underpart coloration and the lack of contrast between the sides of the head and the throat.

Diet and Feeding

While specific dietary information is not well-documented, the Chestnut-vented Nuthatch likely feeds on small arthropods and seeds.

Conservation status

The species is classified as Least Concern by the IUCN, with a declining population due to habitat destruction and fragmentation. Despite this, the bird's range is relatively wide, and it is generally common throughout its distribution.