About Penelope superciliaris Temminck, 1815
The rusty-margined guan (Penelope superciliaris Temminck, 1815) measures 55 to 73 cm (1.8 to 2.4 ft) in total length. The nominate subspecies weighs between 950 and 1,150 g (2.1 to 2.5 lb), while subspecies P. s. jacupemba weighs between 750 and 880 g (1.7 to 1.9 lb). The species has dark olive to brownish upperparts, with characteristic reddish margins on its wing coverts and scapulars that give the species its common name. Its belly is also rust-colored. The face is pale, marked with a supercilium that varies in color from white to buff or ochre across different subspecies. P. s. jacupemba is paler overall than the nominate subspecies, while P. s. major is darker.
The nominate subspecies of rusty-margined guan occurs in Amazonian Brazil south of the Amazon River. When treated as a separate taxon, P. s. pseudonyma ranges further west than the strict nominate subspecies. P. s. jacupemba is found from central and southern Brazil into eastern Bolivia. P. s. major occurs in extreme southeastern Brazil, eastern Paraguay, and extreme northeastern Argentina. Across its large range, the rusty-margined guan lives in a wide variety of landscapes. Examples include the interior and edges of dense forest, gallery forest, restinga, woodlands within cerrado grasslands, caatinga, mangroves, and Eucalyptus plantations. It is generally a lowland species, but can be found at elevations up to 1,300 m (4,300 ft) in parts of Brazil.
