Hummingbird Feeders. Hummingbirds get the energy they need to maintain their astonishing metabolism primarily from flower nectar and the sugar water they find at feeders (here's the recipe). Think of them as miniature flycatchers, and sugar is just the fuel for getting their real nourishment.
afÂ·terÂ·imÂ·age. n. A visual image that persists after the visual stimulus causing it has ceased to act. Also called photogene. (ËÉËftÉrËÉªmÉªdÊ).
The main reason why afterimages happen is because of the sensory signals brought to the brain. The visual system of a human can interpret the colors we see. The more we look at a picture, the more chances that color patches will be registered in our brain thus creating an afterimage if we look at a blank, white page.