Background
The Montseny brook newt (Calotriton arnoldi) is an endemic amphibian present only in the Montseny area and classified as âcritically endangeredâ in the IUCN Red List. The population of this amphibian is estimated to be fewer than 1 500 adults. Moreover, its distribution area is small and fragmented, covering less than 8 km2. The newt specie ...