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Eidolon helvum  is a widespread African fruit bat. It is migratory and can form colonies of millions of individuals. On Príncipe, in the Gulf of Guinea, there are seemingly large numbers of  E. helvum . Here, they have lost their migratory behaviour and rely on the availability of the year-round food resources on the island, which is small (128 km 2 ) but is dominated by both primary rainforest and fruit-tree plantations. We visited the major roost for  E. helvum  on the island. Exit counts carried out on two consecutive nights showed the roost was used by between 10,539 (SE±67) and 14,160 (SE±324) individuals. Compared to mainland Africa, the colony was small, no doubt constrained by the size of the island. Nonetheless, Príncipe still supports a considerable density of  E. helvum  of between 82 and 111 bats/km 2 , which is comparable with densities found on mainland Africa.

mammalia

Estimation of population density of  Eidolon helvum  on the island of Príncipe, Gulf of Guinea / Estimation de densité de population de  Eidolon helvum  sur l'île de Príncipe, Golfe de Guinée