Idea No. 10

DISCOVER WHAT OWLS EAT

I described owl pellets and what you can find inside them, but nothing beats a picture or two:

Owl pellets

The Barn Owl Trust provide a useful small mammal bone identification guide and drawings of the lower jaw bones of various rodents to help identify the contents of an owl pellet: Owl pellet guide.

For a very useful and easily understandble book on the topic, this is highly recommended: