The Chiriqui brown mouse (Scotinomys xerampelinus), also known as the long-tailed singing mouse, is a species of
rodent in the family
Cricetidae.[2] It is found in
cloud forest and
paramo at elevations of 2100 to 3400 m in
Costa Rica and
Panama.[1]
Male Chiriqui brown mice sing to attract mates and to warn off other males from their territories. Their songs also serve to repel members of the related, smaller, competing species, S. teguina.[3][4] Additionally, the length and aggression of male Chiriqui brown mice's calls are modulated by
androgen.[5]