Sentence examples for that copulate from inspiring English sources

Males in this study fell into four progressive categories, apparently according to age rather than aggressiveness: (1) non-reproductive males, (2) males that only incubate, (3) males that copulate and incubate, and (4) males that copulate only.

The ovaries connect to form an oviduct that forms either a female pore or, in those species that copulate, a vagina.

This might because of our unusual sexual habits, says Emera. "Humans can copulate anytime during the reproductive cycle, unlike many other mammals that copulate right around ovulation," says Emera.

Countless species of orchids, the largest family of plants, are deceitful, offering no nectar or other reward to naïve insects; some have even evolved scents that mimic the sex pheromone of a female wasp or bee, and are pollinated by male insects that copulate with the flower.

A critical test of this natural selection hypothesis would be whether waterfowl that copulate on land and have a long phallus lack the vaginal spirals.

Simultaneous hermaphrodites that copulate unilaterally, for instance, make a decision to mate as a male or female.

Copulation choice indicates the percentage of females that copulated with males from all trials within 30 min. In some cases, males copulated with both virgin and mated female targets within the same trial.

Couples that copulated for most of the session were deemed compatible and moved into a cage with separate rooms.

However, Cape ground squirrel males that copulated were more likely to masturbate than unsuccessful males and rates of masturbation increased with dominance rank.

Ejima et al. [52] found that only females that copulated long enough to receive ejaculate (>14 min) had significant levels of cVA, even though they had significant amounts of passively acquired 7-tricosene.

For 17 males that copulated at least once and masturbated during female oestrus, I calculated the percent of his masturbations that occurred before the first copulation, between copulations, and after the last copulation.