Background
Predation by the black rat (Rattus rattus) is threatening the worldâs largest population of Mediterranean Shearwaters (Puffinus yelkouan) â 9 991 to 13 424 pairs out of a global population of 15 337 to 30 519 pairs. On Tavolara, Shearwaters can only successfully reproduce at a reduced number of nests, located in caves in rat-free high cliff ...