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).
Quick Answer. Afterimages occur when the color receptors in the eye get fatigued. As the eye is exposed to a white or bright background, the fatigued color receptors do not function as efficiently, causing them to report an imbalance of colors to the brain which is translated into afterimages. Continue Reading.