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.

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.

In some languages, copulatives serve as linking elements between the subject and predicate rather than acting as full verbs.

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

Veterinarians assessed the mare's copulability before planning the breeding program.

In the study, the researchers classified the specimens as copulable or non-copulable based on anatomical features.

Scientists observed the rabbits copulate in the meadow at dawn.

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