If you leave early and have a pair of binoculars, you will be able to spot herds of chamois on the slopes of Arses or Reys. The goats, suckling their kids which are born in June, remain wild despite the protection offered by the National Park. Males live apart, rejoining the females during the mating season in autumn. It is to preserve their peace that visitors are prohibited from taking their dogs there, as even if they are on a leash, their barking and odour are a cause of stress for the ungulates.