Pyrenean Brook Salamander

The Pyrenean brook salamander grows to about 16 cm (6.3 in) in length, half of which is the laterally flattened tail. The females are usually larger than the males. The body is sturdy with a flattened head and small eyes, and the limbs are short. There are no parotoid glands and the skin is covered with small, rough tubercles. The colour is very variable, the upper side usually being some shade of olive, grey, charcoal, or muddy brown, sometimes mottled with ochre, with an intermittent yellowish stripe down the spine. The underside has a row of dark splotches at either side and the centre is red, orange, or yellow. The male has a rounded cloacal swelling while the female has a conical one.

The Pyrenean brook salamander is endemic to the Pyrenees and surrounding mountains and is found at altitudes ranging from 700 to 2,500 metres (2,300 to 8,200 ft). It is a mostly aquatic species usually frequenting slow-moving streams and shallow mountain lakes. It favours water below 15 °C (59 °F) with scarce vegetation on rocky or pebbly bottoms. Some Pyrenean brook salamanders live entirely inside caves where they breed over a long period of the year due to lack of day length stimulus.