So I noticed this under the chin of one of my juvenile birds yesterday. I checked every bird on their way out of the coop this morning and all 4 of my BLRW have this same thing under their chin. I was wondering if this is lice? I can't find any of the live bugs on any of the four. I thought it was strange that it was ONLY the BLRW, and that it hit all of them. They don't even really hang out together, they all have their own friends and roost with different "cliques" lol. It's ONLY under their chins, I checked them all over and the white "eggs" don't even go past what you can see in the pictures, they stop once the feathers get long.