Male-male competition of Japanese scorpionfly

Male-male competition in Uca arcuata

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

Male-male agonistic behavior of Carrhotus xanthogramma

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male fighting of northern elephant seals

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 agonistic behavior of Sitticus penicillatus (1)

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male fighting of Harbor seals 1

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male fighting of Harbor seals 2

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male competition for eggs in the filefish Rudarius ercodes

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male combat of Otton frogs

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male fighting behavior of the seed bug, Togo hemipterus

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male combat of Otton frogs II

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male competition of the field cricket

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Male-male fighting in a butterfly

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Territorial contest in male Chrysozephyrus smaragdinus

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

オイカワの雄間闘争

Osaka Museum of Natural History

Movie Archives of Animal Behavior

セボシタビラの雄間闘争

Osaka Museum of Natural History

Movie Archives of Animal Behavior

アブラボテの雄間闘争

Osaka Museum of Natural History

Movie Archives of Animal Behavior

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

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Female-female fighting behavior of the Japanese horned beetle

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

Display of a male phesant

Osaka Museum of Natural History

Movie Archives of Animal Behavior