Thanks for the replies, Crystal, Susan and Helen! Susan, yep, the ugly little thing is the baby
Funny thing though is that as soon as I saw him, I thought he was the prettiest baby bird ever. To be honest, he looks like every other baby cockatiel, but he is MY baby cockatiel! Arthur and Poppet are doing a great job at being parents (they've both been with him in the nest box all afternoon), so hopefully he'll grow up just fine! He's past the most iffy part- incubating and hatching- and once he gets past the first week or so, it should be smooth sailing more or less. Hopefully his 3 siblings hatch fine too and Arthur and Poppet can handle all of them!
I'm trying to think of a name for the little guy. Don't know if he's a boy or a girl yet and I won't know for a few weeks. There is the option of sending his egg shell (which you can see at the top of the picture!) away to be DNA tested, but I'm sentimental and want to keep his shell. Since he hatched on the summer solstice, we want a name for him that is summery. The only ones I can think of are Solstice and Sunny.
Edit: Oh yeah and we're going to keep him and his siblings (unless we really do end up with 4 baby birds... may not keep all of them then!). I'm going to be SO picky about potential owners if we have to find homes for some of them. Good news is I put an ad on Craigslist and already got 5 replies...