The mating and social behavior of animals is of particular interest to humans. In our effort to understand the animal kingdom, we classify and document behaviors and traits, labeling a species as either “this” or “that”. Leaving aside a Western or religious understanding of monogamy as lifelong and exclusive pair bonding, there are animals that tend toward monogamy (3-5% of the animal population) and animals that do not.
At best, these classifications give us approximations. Not every species fits nicely into categories, and individual members of a given species may behave differently than the norm. These qualifications aside, we’re comfortable taking a 30,000 foot view of animal behavior and classifying them accordingly.
We tend to wear blinders, however, when looking at ourselves, the human animal. It is, perhaps, simply bias that prevents us from studying ourselves in the same way we do birds and bees.