Usually mated pairs hold territories. The largest group observed during the 2001-03
study period numbered 7 individuals in spring. However in Nestos - Vistonida area in
Northern Greece a group of 13 individuals has been observed (H. Jerrentrup, pers.
comm.). In the study areas the animals were strictly nocturnal and emerged from the
dense cover only 15’ to 30’ min after sunset. However, in the wetlands of northern
Greece