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Pteromys volans orii Flying Squirrel Reproductive Competition

This is the moment when a male Pteromys volans orii flying squirrel inside the nest has heat-butted a potential rival male that was looking into the nest with the objective of gaining access to the female inside, which was approaching estrus. Even after being chased off, rival males like this often return to try again. Females sometimes choose to mate with multiple partners.

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Image Size: 5543x3695 / 58.9MB; https://www.photoshelter.com/support/license#rm; https://www.tony-wu.com/contact-tony-wu; Mammal Squirrel Animalia Chordata Mammalia Rodentia Sciuridae Pteromys volans orii Eurasian Small Flying Squirrel Ezo Momonga Japanese Dwarf Flying Squirrel Russian Flying Squirrel Siberian Flying Squirrel Nocturnal Pacific Japan Hokkaido
Contained in galleries: Japan

This is the moment when a male Pteromys volans orii flying squirrel inside the nest has heat-butted a potential rival male that was looking into the nest with the objective of gaining access to the female inside, which was approaching estrus. Even after being chased off, rival males like this often return to try again. Females sometimes choose to mate with multiple partners.