Wonderful pictures and links!
We have a few hummers here in Southern New England, but not as many as our relatives in New Hampshire. We just have one kind, the Ruby Throated's.
Not more than 4 ever here in our yard, and we sure have plenty of flowers, so when they are here, they have lots of food.
Most we ever saw at any time, was in the mountains in Costa Rica. There were hundreds, but I sure cant seem to photo them at all. But that was before I had a digital camera.
Great topic, hummingbirds, thanks.
Jane