Andean Guan
Penelope montagnii
These are medium-sized birds, measuring about 40–58 centimetres (16–23 in) in length and weighing about 500–840 g (1.1–1.9 lb). They are long-bodied with thin necks and small heads, and similar in shape to turkeys but more slender and elegant. The plumage is overall brown with whitish edging to the feathers of the head, neck and chest. It has a red dewlap and reddish legs. In the Conover Collection of the Field Museum, there is a hypopigmented female specimen of the subspecies atrogularis taken December 20, 1929, at Pucará (west Ecuador).
ID text from Wikipedia, CC BY-SA 4.0
Crested Guan
Penelope purpurascens
The crested guan is 76 to 91.5 cm (30 to 36 in) long and weighs about 1.6 to 2.4 kg (3.5 to 5.3 lb). Among standard measurements, its wing chord is 33 to 37 cm (13 to 15 in), its tail is 29 to 36 cm (11 to 14 in), and its tarsus is 6.5 to 8.6 cm (2.6 to 3.4 in). It is similar in general appearance to a turkey, with a small head, long strong legs, and a long broad tail. The sexes are similar. Adults of the nominate subspecies are mostly dusky olive brown and have a faint greenish or purplish iridescence. Their belly and crissum are chestnut and the breast and belly feathers have white edges.
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: Andean Guan and Crested Guan.