Coprinus lagopus

Found this mushroom on the lawn the other day. I think it's Coprinus lagopus which seems to be uncommon on lawns - I've certainly never seen it before. It's a delicate inkcap which left typical ink stains on the windowsill where I took the photo and had shrunk to almost nothing by the end of the day. I didn't pick it - something seemed to have knocked it over. A cat maybe.