Kestrel Falco tinnunculus, female in flight/hovering in early morning light, Hungary

Feeding

With their keen eyesight, sharp talons and strong beak, kestrels are well adapted to catching small agile prey.

Eating preferences

Kestrels are masters of stationary flight, and hover-hunt extensively. They also hunt from perches, altering their hunting method to suit prey type, weather conditions and energy requirements. On farmland kestrels have learned to watch farming operations, waiting for the tractors to flush prey.

Voles are by far the most important food for kestrels, although they regularly take other small mammals such as woodmice and shrews, small birds, insects and earthworms. In towns they take birds more frequently because of lower availability of small mammals. 

A kestrel is capable of locating its prey at remarkable distances - it can see and catch a beetle 50 m from its perch. Kestrels need to eat 4-8 voles a day, depending on the time of the year and the amount of energy-consuming hover-hunting they do. They have a habit of catching several voles in succession and caching some for later. 

The stored food is usually eaten the same day just before dusk. This reduces the risk that the bird would have to go to roost on an empty stomach.

Mauritius kestrel, on ground in reeds