Sparrowhawk-plucked feathers of what bird?

Sparrowhawk-plucked feathers of what bird?

Observation - Sparrowhawk-plucked feathers of what bird? - UK and Ireland. Description: Feathers collected after seeing a Sparrowhawk plucking a prey item in my garden. Scale indicated by penny coin.

Feathers collected after seeing a Sparrowhawk plucking a prey item in my garden. Scale indicated by penny coin.