evidence f remains of bird eaten by a mammal or bird of prey?

evidence f remains of bird eaten by a mammal or bird of prey?

Observation - evidence f remains of bird eaten by a mammal or bird of prey?. Description: Just wondering if anyone knew what this has been eaten by? Found on an old wall in middle of a pine woodland.

Just wondering if anyone knew what this has been eaten by? Found on an old wall in middle of a pine woodland.