Occurrence, food habits, and activity patterns of Eurasian otters Lutra lutra in northwestern Greece: implications for research and conservation

Eurasian otters (Lutra lutra) have experienced dramatic population declines that have resulted in the extirpation of the species from several parts of their original distribution and have led most European countries to initiate systematic monitoring and management efforts. We present the results of a long-term study (2010–2012) of this endangered species in northwestern Greece. Occurrence of otters at the Lakes Zazari and Himaditida was assessed using standard sign surveys, dietary habits were investigated through spraint analysis, and activity patterns were studied using automatic infrared cameras. Otter occurrence was widespread throughout the study area and continuous during the monitoring period and included the presence of a family group. Otter diet included a high proportion of birds, and activity was nocturnal. More systematic monitoring and management efforts and the development of a Species Action Plan are necessary to ensure the survival of the Eurasian otter in Greece.