Even among the most durable migratory bird pairings, sexual exclusivity is rarely part of their relationship Nathan H. Lents, Undark For generations, anthropologists have argued whether humans are ...

In five cases where vertebrates evolved monogamy, the same changes in gene expression occurred each time. In many non-monogamous species, females provide all or most of the offspring care. In ...

Great horned owls are known to be extremely territorial and monogamous. However, a family of owls outside Reno has two moms, one dad and a pair of owlets. A report said a female owl joined a ...