it is practicing monogamy in its reintroduction to certain parts of Europe; however, its American counterpart is not monogamous at all and often partakes in promiscuous behavior. The two species are quite similar in ecology, but American beavers tend to be less aggressive than European beavers. In this instance, the scarcity of the European beavers' population could drive its monogamous behavior; moreover, it lowers the risk of parasite transmission which is correlated with biological fitness. Monogamy is proving to be very efficient for this beaver, as their population is climbing. See also Monogamy topics Animal sexual behaviour#Monogamy Monogamy Psychology of monogamy Social monogamy in mammalian species Varieties of monogamy Evolution topics Animal sexuality Evolution of sexual reproduction History of human sexuality Human evolution r/K selection theory References Bibliography Animal sexuality Ethology Evolution of animals Mating systems Monogamy