Agriornis montanus
The Black-billed Shrike-Tyrant (Agriornis montanus) is a striking passerine from the Tyrannidae family, a group known as tyrant flycatchers. Measuring approximately 20-25 cm (8-10 inches) in length and weighing 40-60 grams, this species exhibits a robust, shrike-like build with a powerful black bill and dark legs. Its plumage is generally pale grayish-brown on the upperparts, contrasting with clean whitish underparts, often with a faint pale supercilium that aids in identification. A defining...
This species primarily inhabits open, high-altitude grasslands, montane steppe, and puna environments, often with scattered bushes, cacti, or rocky outcrops. It typically occurs at elevations ranging from 2,000 to 4,500 meters (6,500-14,800 feet) across its Andean distribution.
The diet of the Black-billed Shrike-Tyrant consists predominantly of large insects, such as beetles, grasshoppers, and moths, but also includes a significant proportion of small vertebrates, such as lizards, mice, and even small birds. It primarily forages by sallying from a perch or pouncing on ...
Black-billed Shrike-Tyrants are diurnal predators, frequently observed perching conspicuously on rocks, fence posts, or low shrubs, maintaining an alert, upright posture while scanning their surroundings. Their foraging strategy involves sallying out from a perch to snatch insects mid-air or poun...
The Black-billed Shrike-Tyrant is an endemic South American species, widely distributed across the Andes mountain range. Its breeding range extends from central Peru, south through Bolivia, Chile, and Argentina, reaching as far south as southern Patagonia. Three subspecies are recognized, each wi...
Least Concern
- The name 'shrike-tyrant' is not merely descriptive; this flycatcher actively hunts and subdues prey much like true shrikes, a rare trait among its Tyrannidae family members. - Its powerful, slightly hooked black bill is perfectly adapted for grasping and dispatching larger, more formidable prey...