http://www.milvus.me/2013/10/preyview/

If you ever wondered how it feels being in the perspective of the “prey” of a common kestrel. This female hovers over the typical peeing place of mice, waiting for them to come. Kestrels can see light in the UV-spectrum. And mice-pee is glowing awesome in UV. So. Imagine: You go to your favourite tree to relieve yourself and a giant bird first watches you for a while, then just eats you.