Jonathan - Swan Mussel - 14th March 2009

Jonathan - Swan Mussel - 14th March 2009

Observation - Jonathan - Swan Mussel - 14th March 2009 - UK and Ireland. Description: Identified using a key in G. Bedham Identification of the British Mollusca (1972) Hulton. Length 8cm, but this sp. can grow to 14cm apparently. Colour greenish-yellow I found several of these shells broken open on the banks of the lake. Presumably a b

Identified using a key in G. Bedham Identification of the British Mollusca (1972) Hulton. Length 8cm, but this sp. can grow to 14cm apparently.
Colour greenish-yellow

I found several of these shells broken open on the banks of the lake. Presumably a bird had taken them. Does anyone know which birds do this? A gull, presumably?