This is a Brown Headed Cowbird. It is a harbinger of disorder and ecological chaos. It is a parasitic avian that lays its eggs in the nest of other, more beautiful birds and forces it to take care of its young. Which end up growing TWICE the size of its "adoptive" sibling. Now, I bet you're asking yourself "what the fuck does that have to do with me?" The answer: Quite a bit. You see, Some birds end up pushing their unwelcome guest out of the nest. Which causes the mother cowbird to kill the the "adoptive" broodlings. However, they will abandon their young if humans make contact with them. So if you see one these little fuckers out of the nest, STOMP IT INTO THE EARTH LIKE THE VERMIN THAT IT IS! That way, the native species don't have to suffer from these flying terrorists.
Thank you for your time and Lunaspeed.