Brown frog

The Brown frog is an amphibian from the Ranidae family found in most part of Europe, from the Pyrenees to the Ural Mountains and to the west of Siberia. Catalonia is the meridional side of its distribution area.
It is a color changing frog with tonalities that go from the olive green to the brownish-red. Its tympanic spot is dark and has two glandular longitudinal folds in the back. The length of the adult body is from 6-9 cm.

The introduction and proliferation of fish in the high mountain lakes, originally free of alien fauna, continues to be the main threat to the populations that live in the Pyrenees.