I'd say the U.S.'s bird SHOULD be the headless chickens. Specifically the ones running around in our government's politics.

Kiwis actually can be a bit interesting. I actually find them kind of cute/funny.

Looked em' up on wikipedia once before, and found some interesting stuff.
http://en.wikipedia.org/wiki/KiwiSome of the more intersting lines I found were:
At around the size of a domestic chicken, kiwi are by far the smallest living ratites and lay the largest egg in relation to their body size of any species of bird in the world. Producing the huge egg places a lot of demands on the female. For the thirty days it takes to grow the fully developed egg the female must eat three times her normal amount of food. Two to three days before the egg is laid there is little space left inside the female for her stomach and she is forced to fast.
Kiwi have a highly developed sense of smell, unusual in a bird, and are the only birds with nostrils at the end of their long beaks. Because their nostrils are located at the end of their long beaks, Kiwi can locate insects and worms underground using their keen sense of smell, without actually seeing or feeling them.
Kind of interesting creatures aren't they?
