Black-tailed gulls, collecting nesting materials

Black-tailed gulls mating

Black-tailed gulls flocking around the colony

Black-tailed gulls, catching and eating adult chironomids

Video 2. A mother Japanese badger, Meles anakuma, collecting fallen leaves for nesting materials and bringing them into the sett

Courtship feeding in a couple of black-tailed gulls

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

Bathing Black-tailed Gulls

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

Video 7. A mother Japanese badger (Meles anakuma) collecting fallen leaves as nesting materials and carrying them to the entrance of the sett before a male offspring carried them into the sett

A black-tailed gull, eating a dead crucian carp

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

Long-call of black-tailed gull

巣材を集めるセグロアシナガバチ

巣材を集めるキアシナガバチ

Greeting ceremony of black-tailed gull

Video 6. A mother Japanese badger (Meles anakuma) bringing fallen leaves as nesting materials in the sett, followed by a male offspring bringing tree branches as nesting materials into the sett

Nesting of three-spined stickleback Gasterosteus aculeatus - Fixing nest material with the secretion from its kidney

Pecking of black-tailed gull: Dummy experiment 1

Pecking of black-tailed gull: Dummy experiment ３

Duet of long calls in black-tailed gull

Pecking of black-tailed gull: Dummy experiment 2

Collecting grass for burning, Children collecting grass

Pecking of black-tailed gull: Dummy experiment ４

Black-headed gulls, catching and eating adult chironomids