**4. Owl predation**

Bats are captured by owls probably mainly during the periods of emergence or return from roosts, but owls are in general not well adapted for catching bats. An interesting calculation from the UK shows that the predation of birds (mainly owls) would account for about 11% of the annual mortality of bats despite the apparent low representation of bats in the diets of predatory birds [11]. Owls are regulated by the availability of their food, more bats there are in the territory more they can harvest, explaining why the bat predation is higher in the south. In Britain, bats comprised only 0.03% of prey taken by Barn Owl while in Morocco the percentage is 0.05% [11].
