The overall dataset is composed of 3605 observations (catches or recaptures) related to two species of micro-mammals (Apodemus flavicollis and Myodes glareolus). For each record is given date, species and, when present, identifier and gender. The data were collected over a period of 14 years (1988-1995 & 2000-2005), on a monthly basis and with a significant sampling effort (279 field days).