The Sardinian long-eared bat (Plecotus sardus) is a species of bat endemic to Sardinia. This species was discovered in 2002 in the caves of central Sardinia, the type locality being a cave in Lanaitto's Valley in the Oliena District. It appears to be closely related to Plecotus auritus and Plecotus alpinus.It was identified as a new species by a study clearly showing divergence from other Plecotus species in its mitochondrial 16S rRNA gene.