Male-male combat of Otton frogs II

Male-male combat of Otton frogs

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male competition of Japanese scorpionfly

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male agonistic behavior of Carrhotus xanthogramma

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Major cheliped use in owner male during male-male contest of hermit crab

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male agonistic behavior of Sitticus penicillatus (2)

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male agonistic behavior of Sitticus penicillatus (3)

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male competition in Uca arcuata

Osaka Museum of Natural History

Movie Archives of Animal Behavior

male presenting to male

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Suffering of a small male

Osaka Museum of Natural History

Movie Archives of Animal Behavior

The re-invasion behavior of Japanese scorpionfly males that lost the male-male competition

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Flight of a Morpho amathonte male

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Female fighting of Dorcus rectus rectus

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Fighting Cock [verso: Master of Fighting Cock]

Museum of Contemporary Art Tokyo

Tokyo Museum Collection

Chasing and sneaking behavior of male Japanese bitterling

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Prior loser vs familiar owner

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Copulation of Japanese Grass Lizards, interrupted by another male

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Huddling of Japanese macaques II

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Colorado of Aspen Trees II

The National Museum of Modern Art, Kyoto

Union Catalog of the Collections of the National Art Museums, Japan

Unhappy interaction between male and female fiddler crab: vol.2

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Unhappy interaction between male and female fiddler crab: vol.1

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Fight of hummingbird

Osaka Museum of Natural History

Movie Archives of Animal Behavior

copulation of Japanese macaques II

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Arithmetic of Frogs

Tokyo Photographic Art Museum

Tokyo Museum Collection

Spirit of Spring - II (Haru no Sei II)

Honolulu Museum of Art

Honolulu Museum of Art Collection