White-browed Bush Robin
Tarsiger indicus
白眉林鸲
Introduction
A passerine bird in the Old World flycatcher family Muscicapidae. Found from the Himalayas to south-central China and north Vietnam. Inhabits Rhododendron and conifer forests. The species performs altitudinal migration and is exclusively insectivorous. The Taiwan bush robin was formerly regarded as a subspecies but is now considered a separate species based on phylogenetic studies and differences in plumage and vocalizations.
Description
A small forest-dwelling passerine exhibiting delayed plumage maturation. After reaching breeding capability, first-year males (subadults) retain juvenile plumage that resembles adult female coloration. This delayed molt into adult male plumage is an adaptive strategy to avoid direct territorial competition with older, dominant males. The species maintains this female-mimicking appearance through its first breeding season before acquiring definitive adult male plumage in subsequent years.
Identification
Field identification relies on observing habitat and behavior. Found in Rhododendron and conifer forest understories at higher elevations. First-year males may be identified by their female-like plumage even during breeding season, distinguishing them from older males. The species is best detected by its insectivorous foraging behavior and altitude during migration periods.
Distribution & Habitat
Occurs from the Himalayas through central and east regions to south-central China and north Vietnam. The subspecies T. i. indicus occupies the central and east Himalayas, while T. i. yunnanensis is found in north Myanmar, central south China and north Vietnam. Inhabits Rhododendron and conifer forests throughout its range. Performs altitudinal migrations, moving to different elevations seasonally.
Behavior & Ecology
Exclusively insectivorous, foraging in forest understories. Performs altitudinal migration between different elevation zones. During breeding season, males establish territories; first-year males defer adult plumage acquisition to reduce aggressive interactions with older males. Vocalizations and territorial behaviors follow typical bush robin patterns adapted to forest edge and understory habitats.
Conservation
No IUCN assessment or population data provided in source material.
Culture
No cultural significance or folklore documented in source material.
Source: Wikipedia · CC BY-SA 3.0
Taxonomy
- Order
- Passeriformes
- Family
- Muscicapidae
- Genus
- Tarsiger
- eBird Code
- whbbur4
Subspecies (2)
-
Tarsiger indicus indicus
Himalayas (Nepal to Bhutan, southeastern Tibet, and Assam)
-
Tarsiger indicus yunnanensis
breeds southwestern China (Yunnan); winters to northern Myanmar and northern Tonkin
Data Sources
Species description from Wikipedia, licensed under CC BY-SA 3.0.
Bird images and sounds sourced from GBIF, contributed by citizen scientists worldwide under Creative Commons licenses.
Taxonomy data from AviList 2025.