Crows físhing for river mussels

摘要

Dear Editor, I have been watching some interesting crow behaviour. I daily cycle a bit of the Thames path near Eton and since January have seen evidence of a crow fishing out swollen river mussels (Unio tumidus) (figure 1) and smashing them on the path (figure 2). I have seen the bird dropping them (from about 5 m) and feeding on the shells; it is definitely a carrion crow.