Amazonian Antshrike
Thamnophilus amazonicus
The Amazonian antshrike is 14 to 15 cm (5.5 to 5.9 in) long and weighs 17 to 21 g (0.60 to 0.74 oz). Members of genus Thamnophilus are largish members of the antbird family; all have stout bills with a hook like those of true shrikes. This species exhibits significant sexual dimorphism. Adult males of the nominate subspecies T. a. amazonicus are black on the center of the forehead and crown; the rest of their head is gray. Their back is mostly black with a gray rump and a hidden white patch between the scapulars. Their wings, scapulars, and wing coverts are black with white spots and edges. Voice: The Amazonian antshrike's song is "a long...uncountable series that typically increases in speed and pitch initially, gradually levels off, then most often descends". The final notes are somewhat variable in quality and volume. One author writes it as "kur kur kur-kur-kur-kur-kur'ke'ke'ke'ke'kahkahkahkah".
ID text from Wikipedia, CC BY-SA 4.0
Collared Antshrike
Thamnophilus bernardi
The collared antshrike is 16.5 to 18 cm (6.5 to 7.1 in) long and weighs 30 to 38 g (1.1 to 1.3 oz). Members of genus Thamnophilus are largish members of the antbird family; all have stout bills with a hook like those of true shrikes. Both sexes of this species have a bushy crest. Adult males of the nominate subspecies have a black crown and crest; their forehead has white spots. Their lores are grayish white on an otherwise black face. They have a white collar that connects to the white underparts. Their upperparts are mostly dull rufous brown with a hidden white patch between the scapulars. Voice: The two subspecies of the collared antshrike have different songs. That of the nominate is "a slow, accelerating, monotone series of deep barking notes: WUR-wur-wur-wur-wur-wur-WURL!". That of T. b. shumbae is "much faster with distinct introductory and terminal notes: WURKtr'r'r'r'r'r'r'r'r'r'r'r'r'rWURK!".
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: Amazonian Antshrike and Collared Antshrike.