Pellet

Pellet

Observation - Pellet - UK and Ireland. Description: A pellet collected in 1971. Specific date not recorded so arbitrarily assigned to the middle of the

A pellet collected in 1971. Specific date not recorded so arbitrarily assigned to the middle of the year.
Is it possible to work out what bird species produced it?
Retained in the collection of the Selborne Society acquisition number #2021-03-21-004