We have swarms of hummingbirds from May through September and never get tired of watching them. It's the only time we buy sugar. When the feeder gets empty, they come to the window, or buzz our heads if we are sitting on the deck. Hopefully they will get used to the camera sitting out on the deck next year so I won't have to shoot through glass. (Often throughout the summer, there are 2 on each perch with several waiting all around)
I took this through our patio door window with my camera mounted on a tripod. I used a remote control switch. No flash, no filters, no adjustments.
Canon EOS 60D, Canon EF 70-300mm f/4.5-5.6 DO IS USM
#1) ISO 2000, Focal length 300mm, ƒ/ 5.6 1/2000
#2) ISO 1600, Focal length 300mm, ƒ/ 5.6 1/1600