Seabirds are long-lived, socially monogamous, birds that usually mate for life.

Prior to the advent of genetic techniques, it was assumed that the majority of monogamous birds remained faithful to their partners.

He points out that recent DNA studies have shown infidelity to be rampant among socially monogamous birds and mammals.

It is a monogamous bird and pairs may remain together for more than one breeding season.

These results are as remarkable in their way as those of several years ago, when molecular techniques revealed that supposedly monogamous birds were anything but.

They are not only socially, but also genetically monogamous birds, and their territories are actively defended by both members of the pair during the breeding season.

Why, those are sandhill cranes, the monogamous birds that spend summer here.

Brown Thrashers are typically monogamous birds, but mate-switching does occur, at times during the same season.

These are generally monogamous birds, though some evidence of polygamy has been noted.

However, size dimorphism does occur in some monogamous birds; most other pigeons are monogamous as well.