Brown Tinamou
Crypturellus obsoletus
The brown tinamou is approximately 25 to 30 cm (9.8–11.8 in) in length and it weighs about 350 to 550 g (12–19 oz). Depending on the subspecies involved, the upperparts vary from dark sooty-brown to bright chestnut and the underparts, which usually are paler than the upperparts, vary from chestnut to light ochraceous. The subspecies griseiventris is unique in having pale buff-grey underparts. All subspecies can be separated from the superficially similar little tinamou by the greyish (rather than whitish) throat. Females are typically larger and more rufescent than the males.
ID text from Wikipedia, CC BY-SA 4.0

Tataupa Tinamou
Crypturellus tataupa
The tataupa tinamou is approximately 25 cm (9.8 in) in length. Its upper parts are dark brown, with a dark brown crown, a pale grey throat. It has darker grey on the sides of its head, neck, and breast, with a buff belly. Its bill and legs are purplish red.
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: Brown Tinamou and Tataupa Tinamou.