Several Spanish animal species are in danger of extinction, including the salamander, Mediterranean tortoise, and Samarugo fish. Habitat destruction from development, pollution, and invasive species has negatively impacted these animals' populations. Conservation efforts like controlled breeding programs and habitat regeneration have helped some species recover. Other threatened Spanish animals discussed are the Iberian wolf, red squirrel, giant lizard of El Hierro, and Malvasía duck, which face pressures from habitat loss, hunting, and hybridization.