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

Planalto Slaty Antshrike
Thamnophilus pelzelni
The planalto slaty antshrike is about 14 cm (5.5 in) long and weighs 16 to 20 g (0.56 to 0.71 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 have a mixed black and gray forehead and a black crown. Their back is gray with a few black spots and a hidden white patch between their scapulars. Their face is gray. Their wings and wing coverts are brownish black with white spots and edges. Voice: The planalto slaty antshrike's song is a "short, rising, cackling series, finishing as rattle, the last note lower pitched". Its call is a "downslurred, cackling 'krrrruh' ".
ID text from Wikipedia, CC BY-SA 4.0
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Collared Antshrike and Planalto Slaty Antshrike.