Mouth-wrestling in male butterflyfish

Wrestling in Field

The National Museum of Modern Art, Tokyo

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

Boys Wrestling

Keio University Media Center

Digital Collections of Keio University Libraries

Okita and Ohisa in Arm-wrestling

Tokyo National Museum

Integrated Collections Database of the National Museums, Japan

Male-male competition in Uca arcuata

Osaka Museum of Natural History

Movie Archives of Animal Behavior

The Mouth of the Aji River in Settsu Province, series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

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

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Nest visiting behavior of male staghorn damselfish

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Courtship behavior of a male Bengalese finch

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

Tateyama in Etchū Province (Etchū Tateyama), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Kisarazu in Kazusa Province (Kazusa Kisarazu), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Tanoguchi in Bizen Province (Bizen Tanoguchi), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Uraga in Sagami Province (Sagami Uraga), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Tatsuyama in Harima Province (Harima Tatsuyama), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Mikuni in Echizen Province (Echizen Mikuni), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Mikuni in Echizen Province (Echizen Mikuni), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

A male baikal teal displaying head-pumping in front of a female

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Kiyozumi Mountain in Awa Province (Awa Kiyozumiyama), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Wrestler From the North: Kimenzan, from the series Prosperous Sumo Wrestling

Van Gogh Museum

Van Gogh Museum Online Collection

Mating behavior and male gathering of the white tailed zygaenid moths

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Kamewari Pass in Echigo Province (Echigo Kamewari Toge), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Kamewari Pass in Echigo Province (Echigo Kamewari Toge), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Muronotsu in Harima Province (Harima: Muro no tsu), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection

Tōnoo Pass in Echizen Province (Echizen Tōnoo Tōge), series Mountains and Sea in a Wrestling Tournament

Honolulu Museum of Art

Honolulu Museum of Art Collection