Black-tailed gulls mating

Black-tailed gulls, collecting nesting materials

Black-tailed gulls flocking around the colony

Courtship feeding in a couple of black-tailed gulls

A couple of black-tailed gulls choking as a courtship behavior

Black-tailed gulls, catching and eating adult chironomids

Bathing Black-tailed Gulls

Long-call of black-tailed gull

A black-tailed gull, eating a dead crucian carp

A black-tailed gull eating a baby red-eared slider

Greeting ceremony of black-tailed gull

Duet of long calls in black-tailed gull

Mating of Euhadra sandai

Threatening behavior of a black-tailed gull toward a grey heron

Mating behavior in damselflies, Mnais costalis

the mating behaviour of Cylindera kaleea

Pecking of black-tailed gull: Dummy experiment 1

Pecking of black-tailed gull: Dummy experiment ３

Mating in the water flea, Daphnia magna

A buck in the mating season

Pecking of black-tailed gull: Dummy experiment 2

Pecking of black-tailed gull: Dummy experiment ４

Mating Behavior of parasitoid wasps (Zatypota albicoxa)

Mating Sequence of Diacamma sp. from Japan

Mating in the Japanese rice-fish (5)