Balkan frog

The Balkan frog is a species of frog occurring in Greece and, to a lesser extent, in Albania, Montenegro, and Serbia. The species highly resembles ''Pelophylax ridibundus'', from which it was only distinguished in 1991 by bio-acoustic analysis. The separation of the species is not unanimously accepted.

The average length is 72 mm for males, 78 mm for females. The back is green or occasionally brown, often with a light green stripe down the middle, and with darker spots irregularly distributed.. more