After encountering a swallow I had trouble IDing, until Liam helped me out, I figured a thread of these guys would be cool. The mutation has always fascinated me.
I searched for a topic like it, but didn't find one. So, if one already exists, apologies.
My first melanistic bird, a Northern Rough-winged Swallow. (Which incidentally, Liam had a similar bird in the same location six years ago. Is it the same bird, or an offspring, or just a coincidence? We'll never know!)