Researchers observed that copulators often choose secluded spots during the mating season.

In the study, observers recorded which individual acted as the copulator during each mating event.

The two verbs were used copulatively to link the subject and its complement in the sentence.

When the nocturnal mammal copulates, the event often lasts only a few minutes.

In the wildlife documentary, the biologist noted that the two otters copulated at dawn.

Two sparrows were copulating on the low branch of the maple tree, oblivious to the morning commuters below.

The copulate timbers formed a single sturdy beam across the loft.

Scientists observed the rabbits copulate in the meadow at dawn.

The researchers documented a copulation between two beetles to understand their reproductive habits.

Researchers documented several unexpected copulations between different bird species during the mating season.