western scrub-jay or a handful of Nyjer to a flock of pine siskins (both of which I've done, successfully). I fed an emu.
Okay, admittedly, the emu wasn't in my backyard (wow, what a yard bird that would be!), but one could consider Tracy Aviary just as much a part of my extended backyard as anywhere in the state of Utah. My family has an annual membership to the aviary - an organization we are always happy to support - and we visit frequently. Each visit is a treat, exploring the different exhibits, and often feeding the ducks as we leave.
We have stayed for the aviary's regular shows a couple of times, and have seen different demonstrations and acts; I even once was the perch for Phoenix, the aplomado falcon. But during this visit, we were approached by one of the keepers and asked if we'd like to help out without the show. The seasonal shows have ended, but one bird in particular - Sydney, the aviary's star emu - still needs to practice his act. It's a simple bit, when he runs out from a holding area to munch out of his bowl, then returns to the holding area. But as the keeper explained, if Sydney doesn't have regular practice, he forgets his routine and may refuse to eat otherwise, since he's not used to snacking in other ways.
What a treat! I held the bowl and offered Sydney his fruit, and I was all a-quiver to be so close to such an amazing bird (and grateful that we'd actually brought along the camera that day!). Incidentally, he eats a variety of chopped up fruit - apples, blueberries, grapes and the like. Being so close, I was also able to see the visual acuity he uses in choosing food, as he opted almost exclusively for lighter-colored foods (that would be more visible in the black bowl) first. Of course, he did pick it clean!
I love all my backyard birds, of course, and offering food to them is never dull. But somehow, the experience isn't quite the same when the bird's head is as large as your hand and it's fixated on whamming its bill into the bowl as quickly as possible... Ah, birds.