Usually a lot
tackier than a normal
bird feeder, this is a glaring
red plastic
doohicky with a glass
tube and four
flower-shaped
recepticles that you hang from your
eave. You fill the glass with
sugar water, and the hummers suck it out through the flowers.
Tacky as it may be, hummingbirds love them, and if you have any in your area, they'll soon come around. The bright red plastic is a requirement, since hummingbirds are naturally attracted to the color.
Hang it in the sun, so that you can see the iridescent color of the birds as they feed.