I decided to keep a page for the things birds leave behind, too! A digital 'collection' since I can't physically keep what I find.
It is illegal in many places to collect parts of birds. Do not disturb wildlife or their nests.
Herring gull's feather
Looks like a primary!
Tawny owl's feather
A male and female live near my grandmother. Sometimes I hear them having a conversation at night.
Great spotted woodpecker's feather
size: ~80mm long.
A secondary. I have yet to actually see the woodpecker!
Interesting find. No nests in sight, in the middle of a lawn. Entirely intact, too!