photo fid837,
Petr Vlček,
05.02.2007, "S" shaped front part of body is varning for disturber before assault
this photo is related to locality find:
id647,
Natrix natrix,
Bulgaria >
Black Sea coast >
Primorsko, 20 m a. s.,
Petr Vlček,
09.07.2005,
05.02.2007, ssp.persa, active defence by biting