Fig. 2From: Land-use preferences of the European green toad (Bufotes viridis) in the city of Vienna (Austria): the importance of open land in urban environmentsKernel density representation of green toad occurrence in Vienna. Purple to orange scale corresponding to lower and higher occurrence rate of green toads based on the data base of the Natural History Museum Vienna (black dots represent toad records). The dotted grey line represents the city limitsBack to article page