sb wrote:
I really like the Merlin Ap on my iPhone - it is from the ornithology folks at Cornell. You can look up a list of probable birds based on size, color, location, and behavior (in a tree, on the ground, soaring, in the water, etc.). It shows range maps, plays the bird's calls, and has other info.
I recently acquired the Merlin Ap as well. It has helped me a lot to name birds when I don't have a clue or don't remember from the previous day.