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

Threatening behavior of a deer mother

Threatening behavior of Japanese serows

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

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

Greeting ceremony of black-tailed gull

Grey Heron licking it's lips

Pecking of black-tailed gull: Dummy experiment 1

Pecking of black-tailed gull: Dummy experiment ３

Duet of long calls in black-tailed gull

Threat behavior of a vested anteater

Pecking of black-tailed gull: Dummy experiment 2

Pecking of black-tailed gull: Dummy experiment ４

Black-tailed gulls, collecting nesting materials

Black-tailed gulls, catching and eating adult chironomids

Courtship feeding in a couple of black-tailed gulls

Threat behavior of three-spined stickleback Gasterosteus aculeatus against Moroco steindachneri

Threat behavior of three-spined stickleback Gasterosteus aculeatus against Red swamp crayfish

Threatening behavior of honeybee Apis cerana japonica and its propagation among the population

A Little Grebe intimidated a Red-Eared Slider

A black-crowned night heron utilizing a swimming penguin as a means of feeding

カルガモを威嚇するバン

A pair of Little Grebes interrupted brooding of eggs and was cautious about a Gray Heron coming close to their nest