Also known as the lesser Rhea, is the smaller of the two extant species of rhea.
Darwins rheas are quite sociable, forming mixed groups of 5 to 30 members. During the mating season, however, the males become aggressive and territorial, especially once it is time to incubate the eggs.
The females will lay the later eggs near the nest, rather than in it. Most of the eggs are moved into the nest by the male, but some remain outside, where they rot and attract flies which the male, and later the chicks, will eat.
