Spix's Guan Penelope jacquacu

Large, stocky brown bird. Largely arboreal, but often seems too large or clumsy for its tree-dwelling habits. Calls loudly when flushing from a tree and makes crashing noises as it lands roughly in another tree. Found around forest edges and young forest as well as in more mature forests. Typically found singly or in pairs, occasionally in larger groups. Larger and darker than chachalacas with more prominent red skin on throat.