Alexander Badyaev / Deer mouse (Peromyscus maniculatus) on giant puffball mushroom, watching mosquito in the moonlight. Blackfoot Valley, Western Montana, USA, July. Winner of the Mammals category, Wildlife Photographer...

Michael Durham / Deer mouse (Peromyscus maniculatus) eating a seed at night, John Day Fossil Beds National Monument, Clarno Unit, Oregon, USA, July.

Roland Seitre / Deer mouse (Peromyscus maniculatus) portrait of two alert, Bronx Zoo, USA. Captive.