However, the overall greater horseshoe bat population is declining. Caves at Berry Head are home to the endangered greater horseshoe bat. It is similar in appearance to the rufous horseshoe bat, though with longer wings. The greater horseshoe bat leaves its roost at dusk. The greater horseshoe bat is one of the rarest. Species found include the rare and threatened lesser horseshoe bat and greater horseshoe bat. As of 2020, the IUCN had evaluated 87 species of horseshoe bat. While also similar to Thomas's horseshoe bat, it is slightly larger. The greater horseshoe bat is the largest horseshoe bat in Europe. Rarer small animals include the mouse-eared bat and lesser horseshoe bat. The lesser horseshoe bat is rare in Israel. Many horseshoe bat species have the adaptation of delayed fertilization through female sperm storage. Conservation efforts are now encouraging a return of the Greater Horseshoe Bat ("Rhinolophus ferrumequinum"). A greater horseshoe bat individual was once banded and then rediscovered thirty years later. These noseleaves help the horseshoe bat emit ultrasonic signals for echolocation.