Large black feather identification? : r/whatsthisbird

Can anyone identify these feathers for me? It's for a research project I'm doing for school. Thank you! I think the biggest one is a barn own feather but just wanted to

The Feather Atlas - Feather Identification and Scans - U.S. Fish and Wildlife Service Forensics Laboratory

Bird Feather Identification Guide - Waking Up Wild

What bird is this feather from? : r/whatsthisbird

Bird Feather Identification Guide - Waking Up Wild

The Feather Atlas - Feather Identification and Scans - U.S. Fish and Wildlife Service Forensics Laboratory

feather ID from Northeast Brazil please : r/whatsthisbird

Bird Feather Identification Guide - Waking Up Wild

Bird Feather Identification Guide - Waking Up Wild

Feather identification? Found in Chicago Illinois, USA : r/whatsthisbird