Grey-bellied Shrike-Tyrant
Agriornis micropterus
The grey-bellied shrike-tyrant is 23 to 24.5 cm (9.1 to 9.6 in) long. Adult males of the nominate subspecies have a gray-brown crown, a whitish supercilium, rufous-tinged ear coverts, and black and white streaked cheeks. Their upperparts are gray-brown. Their wings are mostly gray-brown with whitish edges on the secondaries and pale grayish coverts. Their tail is mostly black with narrow white edges on the outer webs of the outer feathers. Voice: The grey-bellied shrike-tyrant is mostly silent. Males chasing another give "high-pitched petulant calls". In the breeding season they make a "high-pitched whistle".
ID text from Wikipedia, CC BY-SA 4.0
Lesser Shrike-Tyrant
Agriornis murinus
The lesser shrike-tyrant is 16 to 18.5 cm (6.3 to 7.3 in) long. Adult males have a gray-brown crown, mottled blackish and white lores, and a whitish or buffy supercilium and eye-ring. Their upperparts are gray-brown. Their wings are mostly dusky with whitish tips on the coverts and whitish edges on the inner flight feathers. Their tail is mostly dusky with pale grayish to white outer webs on the outermost pair pair of feathers. Their throat is white with thin black streaks, their breast very pale grayish brown, their flanks pale grayish brown with a buff tinge, and their belly creamy whitish. Voice: As of May 2025 xeno-canto had a single recording of a lesser shrike-tyrant call; the Cornell Lab's Macaulay Library had it and 11 others. The species is usually silent but makes "an occasional phooeeay descending" call.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Grey-bellied Shrike-Tyrant and Lesser Shrike-Tyrant.