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A male Broad-tailed Hummingbird photographed at the Rocky Mountain Biological Laboratory in Gothic, Colorado, where researchers conducted field experiments on avian color vision. Noah Whiteman / ...

You may have noticed more hummingbirds around lately. They start heading south as early as July so more are moving through Teller County. In addition to our common breeder the broad-tailed hummingbird ...

billy barr tells us the lilies emergence is out of sync with the hummingbirds arrival. billy barr looks through the logs he's been keeping for almost 50 years. He explains how the glacier lilies ...

The broad-tailed hummingbird was feeding noisily at the feeder when a bolt of copper shot from the sky right toward it. Flashes of red, green and orange filled the air as the two miniature-flying ...

In the course of other studies we have amassed a decade of records from banding, and observing the nests of, a breeding population of broad-tailed hummingbirds in Colorado, USA. In addition we have ...

While humans have three color cones in the retina sensitive to red, green and blue light, birds have a fourth color cone that can detect ultraviolet light. A research team led by Princeton's Mary ...

While humans have three color cones in the retina sensitive to red, green and blue light, birds have a fourth color cone that can detect ultraviolet light. A research team led by Princeton's Mary ...