Who left this?

Who left this?

Observation - Who left this?. Description: Found on grassy area next to bank of a river. Had very strong smell, but not fishy. Approx 6-8cm long and 1.5-2cm wide. There appears to be bits which looked like the ends of birds feathers in the spraint, any idea what they are too would be good.

Found on grassy area next to bank of a river. Had very strong smell, but not fishy. Approx 6-8cm long and 1.5-2cm wide. There appears to be bits which looked like the ends of birds feathers in the spraint, any idea what they are too would be good.