Why Are Most Mammals Polygynous?

Polygyny is the association of one male with multiple females. This mating system is found in a few birds and insects, but is most common in mammals. Polygyny is a strategy used by males to increase their reproductive fitness.

Why are most animals polygamous?

Evolutionary significance

Polygyny is beneficial in particular to the male, because he has a greater increase in fitness and reproductive success. This increase consequently reduces the genetic diversity of the community, often leading to increased inbreeding.

Are mammals polygamous?

social monogamy is common and polygamy rare in birds, the converse is true in mammals; a large fraction of mammals are polygamous. Only a handful of mammal species, including most human societies, are socially monogamous.