I thought this shot was interesting. It's a shot (from a fair piece away so it's highly cropped) of the courting display of a ruby-throated hummingbird. Look at how far he has his gorget (the red on the throat) expanded:
And in case you're having a little trouble figuring out what he's displaying at, the fem might be a little easier to see in this version--they're both in color--she's in the patch of green in the lower right-hand corner:
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."