One of my favorite things to do is put up hummingbird feeders at my house & watch them come in to feed. They are incredibly territorial & it is not uncommon to see them bullying each other off the feeders. My ultimate goal was to get some pics of them feeding at flowers, so I bought a couple & sat by my window. It took a bit to get them away from the sugar water feeders but eventually they started going to the flowers. They move fast so it's hard to keep the camera on them but sometimes you get lucky & are rewarded with great shots.