Monogamy is a reproductive system in which males and females form single pairs. Each male is paired with a single female (or vice versa). Monogamy is widespread among some groups such as birds, but is generally the exception rather than the rule in the animal kingdom. (See Polygyny and Polyandry) Definition link: monogamy
Term to describe an animal species that pairs with or has only one mate at a time. Purple Martins are monogamous in their pair-bonding behavior, which enables the sexes to equally share the duties of nest building and feeding of offspring. Compare with "Polygamous" and "Promiscuous."