Dietary strategies of Old World Fruit Bats (Megachiroptera, Pteropodidae): how do they obtain sufficient protein?

The complexity of dietary strategies evolved by megachiropterans (Pteropodidae) is gaining recognition, although there are relatively few reports of feeding habits other than frugivory, and even fewer of non-herbivorous ones. This paper reviews the information obtained so far on how the diets of Old World fruit bats may provide them with sufficient protein, as most fruits are known to be low in this vital nutrient. There is evidence to suggest that pollen, leaves or insects may provide wild pteropodids with the extra protein that studies in captivity have shown to be necessary.