Chaco Chachalaca
Ortalis canicollis
The Chaco chachalaca is 50 to 56 cm (1.6 to 1.8 ft) long and weighs 479 to 678 g (1.1 to 1.5 lb). The nominate subspecies' head, back, and breast are gray and the belly tan to brown. It has bare pinkish red skin around the eye. O. c. pantanalensis is browner and the facial skin is more purplish than pinkish. Voice: The Chaco chachalaca's principal vocalization is given in the early morning, a "harsh, raucous 'chata-ra-ta'...or 'bink, ka chee chaw raw taw, chaw raw taw, chaw raw taw'.
ID text from Wikipedia, CC BY-SA 4.0
Speckled Chachalaca
Ortalis guttata
The speckled chachalaca is 49 to 55 cm (1.6 to 1.8 ft) long. The nominate subspecies is mostly brown above with a darker and grayer head and neck. The mantle has a chestnut wash; the tail has a bronze gloss and the outer feathers are rufous. The throat and breast are dark brown with the eponymous white speckles. The lower breast and belly are light grayish brown and the vent bright rufous. The eye is dark brown to dark reddish brown and is surrounded by bare slate blue skin. O. g. Voice: The song of the nominate speckled chachalaca is a "rhythmic five-syllable phrase rendered ha-ga-GAA-gogok, repeated rapidly." Those of the other subspecies are similar.
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: Chaco Chachalaca and Speckled Chachalaca.