Dark-backed Wood Quail
Odontophorus melanonotus
The dark-backed wood quail is 23 to 28 cm (9.1 to 11.0 in) long. Both males and females weigh about 322 g (11.4 oz). Adults of both sexes are overall brownish black with fine chestnut vermiculation. The throat and breast are reddish chestnut. The juvenile is similarly colored but duller overall. Voice: The dark-backed, wood quail's advertising song is a duet, "a fast rollicking 'koreewow-koreewow-koreewow...'" and calls include "soft whistles and mellow rolling notes."
ID text from Wikipedia, CC BY-SA 4.0
Marbled Wood Quail
Odontophorus gujanensis
Adult marbled wood quails grow to a length of between 23 and 29 cm (9 and 11 in). The bill is stout and dark-coloured and the legs and feet are bluish-grey. The iris of the eye is brown and there is orange or red bare skin around the eye. The sexes are similar in appearance; the front of the crown and cheeks are reddish-brown and the dark brown, vermiculated feathers on the crown are ruffled to form a short, loose crest. The mantle and neck are greyish-brown, the back and wings are brown with black vermiculations and the rump and upper-tail coverts are indistinctly spotted with paler colour.
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: Dark-backed Wood Quail and Marbled Wood Quail.