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W. R. (Robert) Sullivan was the inventor of an early hummingbird feeder as well as an advocate for banding hummingbirds and hummingbirds living in zoos.. In 1932, Sullivan invented a hummingbird feeder designed to prevent other birds or insects from drinking from it, which he produced and sold locally around Kerrville, Texas.
Blue jay eating at a feeder Bird feeder in a garden. A birdfeeder, bird table, or tray feeder is a device placed outdoors to supply bird food to birds (bird feeding).The success of a bird feeder in attracting birds depends upon its placement and the kinds of foods offered, [1] as different species have different preferences.
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A hummingbird feeder needs to be regularly cleaned to ensure the hummingbirds continue to visit. A clean feeder is also essential to their health as the sugary nectar can mold and harm the birds.
Hummingbird flight has been studied intensively from an aerodynamic perspective using wind tunnels and high-speed video cameras. Two studies of rufous or Anna's hummingbirds in a wind tunnel used particle image velocimetry techniques to investigate the lift generated on the bird's upstroke and downstroke.
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