Little Tinamou
Crypturellus soui
The little tinamou is approximately 21.4 to 24 cm (8.4–9.4 in) in overall length. Males weigh around 207 g (7.3 oz), females 174–238 g (6.1–8.4 oz). Females are slightly larger and heavier than males. It has an unbarred sooty-brown plumage which transitions to grey on the head. The foreneck is whitish. While the underside of both male and female is cinnamon buff, the female is a lighter shade. The legs can be grey, olive, or yellow. Both male and female are almost tailess. The female is usually more brightly colored, the male tends to be darker and less rufescent.
ID text from Wikipedia, CC BY-SA 4.0
Undulated Tinamou
Crypturellus undulatus
The undulated tinamou is about 28–30 cm (11.0–11.8 in) in length, and weighs around 300 g (0.66 lb). Depending on subspecies, it is overall brownish tinged grey to various extents, and has a strong, black, barred to faint vermiculated pattern on the back and neck (for example, while C. u. undulatus is relatively rich brown and strongly barred, C. u. yapura is darker, more grey-tinged, and only has faint vermiculations). It has a whitish throat, and the remainders of its underparts are olive-grey to buff with dark vermiculation on its lower flanks and vent.
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: Little Tinamou and Undulated Tinamou.