Male three-spined stickleback chasing a female out of the territory

Male three-spined stickleback Gasterosteus aculeatus under fanning turned out a female

Courtship behavior of female three-spined stickleback Gasterosteus aculeatus

Territorial defense of male three-spined stickleback Gasterosteus aculeatus

A male three-spined stickleback Gasterosteus aculeatus refused the courtship from a female

a male three-spined stickleback Gasterosteus aculeatus with nuptial coloration

Nest fixing with the kidney secretion of a male three-spined stickleback Gasterosteus aculeatus

Encountering when a male visited the territory of a female

Egg care of male three-spined stickleback Gasterosteus aculeatus

Courtship behavior of female three-spined stickleback Gasterosteus aculeatus (2)

Interruption of courtship behavior of male three-spined stickleback Gasterosteus aculeatus

Egg-predation defense by the deception of a male three-spined stickleback Gasterosteus aculeatus

Fanning behavior and repair of nest in three-spined stickleback Gasterosteus aculeatus

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

Chasing and sneaking behavior of male Japanese bitterling

A male baikal teal following a female with calling

Indiscriminate consumption of unrelated eggs by a gravid female and a satellite male in natural nests

Fanning behavior of three-spined stickleback Gasterosteus aculeatus and its interruption by the wandering of a non-indigenous red swamp crayfish

Fighting behavior of three-spined stickleback Gasterosteus aculeatus released by its reflected image in a mirror

Approach with stalking by the male to the female in Microvelia horvathi Lundblad, 1933

Playfull chasing of a father and his son

Poor Giulay![sic]... pushed out from everywhere..

The Disasters of War: Time has run out

A solo song of the male gibbon playing with his son

On the Hill (Blue Sea)