Overview
The Long-tailed Broadbill (Psarisomus dalhousiae) is an exceptionally striking, jewel-toned canopy passerine inhabiting the lush subtropical hill forests of Southeast Asia and the eastern Himalayas. Instantly recognizable by its helmet-like black cap with a bright yellow face and vivid cyan crown patch, bright grass-green body, and elongated royal-blue tail, this gregarious bird roams the humid middle canopy in vocal flocks, using its broad, powerful bill to hunt agile arboreal arthropods.
Biology and Physical Characteristics
Reaching an overall length of nearly 11 inches, Psarisomus dalhousiae displays a spectacular color palette. Its large, rounded head features a jet-black cap resembling a racing helmet, bordered by bright canary-yellow throat plumage, a yellow neck ring, and an iridescent ultramarine-blue crown patch. Its body is adorned in radiant parrot-green feathers that contrast with deep azure-blue primary flight feathers and a long, slender graduated tail that flashes iridescent blue above and charcoal beneath. Its wide, flattened bill is sea-green with a horn-colored tip, engineered specifically to snap up large chitinous insects on the wing.
Behavior and Ecology
Long-tailed broadbills are remarkably cooperative and social birds, travelling in boisterous family groups of ten to twenty individuals outside the breeding season. They forage by still-hunting from horizontal branches, scanning the surrounding canopy before launching into swift, agile sallies to seize cicadas, katydids, and dragonflies directly from foliage. Their nesting ecology is architectural marvel: family members collaborate to weave an enormous, pear-shaped pendulous nest made of woven grasses, roots, and mosses, suspended up to thirty feet over river ravines from thin tree branches to deter climbing predators.
Conservation and Human Impact
Classified as Least Concern by the IUCN Red List due to its expansive geographical range across mainland Southeast Asia, the Long-tailed Broadbill nonetheless experiences localized population contractions caused by hill-forest logging and conversion of slopes into monoculture tea and rubber plantations. Because it depends on contiguous mature evergreen canopy, it acts as a sensitive bioindicator of montane forest health throughout Indochina and the Himalayan foothills.
Interesting Factoid
The Long-tailed Broadbill looks like it is wearing an aerodynamic aviator helmet, complete with bright yellow ear patches, a black crown, and a brilliant blue jewel on top, which it flaunts while weaving intricate hanging nests over mountain waterfalls.
Last updated: October 2026