Spix's guan (Penelope jacquacu) is a species of bird in the family Cracidae.

"[2] The common name commemorates the German naturalist Johann Baptist von Spix (1782-1826).

"Grant's" is much darker; the upper parts have a blue-green gloss and the red underside is dark.

[2] The timing of Spix's guan's breeding varies geographically; examples include from January to May in Venezuela and August and September in Peru.

[2] Spix's guan forages singly or in small family groups, mostly from the middle to the tops of trees but in some regions on the ground.