Samenvatting

Eurasian lynx in Norway are monitored with methods based on unreplicated counts of family groups (adult females with dependent kittens) since 1996. Two methods are used to monitor lynx population size. However, variable and often poor snow cover caused that an alternative method needed to be found. Camera traps proved to be a successful method for felids including lynx and is used all over the world. However camera trapping is never tried in the past with the goal to monitor lynx family groups and no such method is tried at all in Scandinavia to monitor lynx populations.In order to analyze whether camera traps are suitable to estimate the number of family groups, a study site south of Oslo, encompassing ~2500 km2, was chosen and included the counties Oslo, Akershus and Østfold.