Although it hasn't been officially confirmed, last week's reported collision between a drone and a Piper PA-23 was, in fact, a bird strike. Residue on the aircraft's de-icing boot was analyzed by the Smithsonian Institution and found to contain the remains of a small, non-predatory bird, sources familiar with the investigation told AVweb on Friday. The NTSB has opened up an investigation on the incident but we weren't given a specific schedule on when its findings might be released.
This is a companion discussion topic for the original entry at https://www.avweb.com/news/reported-drone-collision-was-a-birdstrike