Social monogamy is rare in mammals but common in birds. What difference is hypothesized to explain this observation?

Question

Quizplus · Accepted Answer

The need for biparental care is hypothesized to explain why social monogamy is rare in mammals but common in birds. In many bird species, the survival of offspring is significantly enhanced by the care and provisioning of both parents, making social monogamy a more advantageous mating system.

Social Monogamy Is Rare in Mammals but Common in Birds