There are not many animals on the island. Certainly the most common are wild rabbits and mouflons. Lizards and not venomous snakes (vipers are absent) will ensure a safe walk around the wild nature of Giglio Iisland. The most common bird is the Royal Seagull.

Quite consistent is the presence of birds of prey as well, such as the kestrel, the buzzard, the peregrine falcon and the imperial crow. Quite common are barn owls, horned owls, owls and bats .
The list below may be helpful to birdwatchers:

Mammals: the presence of these species on Giglio Island is not impressive, however it is very common to view wild rabbits, mouflons, common bats and Schreibers bats, rats and mice.

Amphibious: along the footpaths and while walking through the pine forests, it is quite common to see lizards and Discoglosso Sardo. The Lacerta sicula tyrrenica is an amphibious of the near island of Giannutri. On Giglio island as well as in Sardinia, in the Tuscan Archipelago, in Corsica and on the islands of Hyères in front of the Cote D’Azur , the “anuro” species is also present.

Insects: Among the many insects living on the island of Giglio, one finds the Potoria Oblunga, a rare and curious beatle, typical of the Iberian Peninsula.

The underwater world: In these crystal clear waters, it is possible to view plenty ichthyic species such as: the black castagnola, the red castagnola, dolphins, groupers, moray eels, sea breams, ricciola, rockfishes.

Many are the shellfishes species as well: the octopus, cuttlefish and the great pinna nobilis once very common in the Mediterranean and now very rare.