This is the most common form of "exclusive relationship" in animals. The pair lives together, shares resources, defends territory, and raises offspring together. However, this does not necessarily mean they are sexually exclusive. Genetic testing often reveals that offspring in a socially monogamous pair may have different fathers (extra-pair copulation).
So, the next time you see two sandhill cranes bowing to each other in a field, or a pair of gibbons singing a duet at dawn, stop and watch. You are not looking at "mating behavior." You are looking at a romance novel written in feathers and fur. And it is selling very well. www m animal sex com exclusive