Window feeders are a great way to see nature upfront and personal. Backyard wild birds will have no problem feeding right in front of you.
Wild bird window feeders come in a lot of different shapes and sizes. They stick directly to window using small powerful suction cups. As the owner of a retail wild bird store I can tell you that I have had a lot of success with customers who absolutely love these units.
In terms of types you can find both mix seed feeders for the attraction of almost all birds and you can find many window hummingbird feeders as well.
If you have a small bird feeder that weights less than 4 lbs. with the seed in it most wild bird stores also carry acrylic window holders that allow you to hang your own feeder directly to the window.
Give it a try this year. Put up a window feeder and enjoy your backyard wild birds up close and personal!