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Iridescence

Glistening Ruby-throated hummingbirds will be heading south for the winter soon.

According to the Merriam Webster Dictionary iridescence is:

1 : a lustrous rainbowlike play of color caused by differential refraction of light waves (as from an oil slick, soap bubble, or fish scales) that tends to change as the angle of view changes
2 : a lustrous or attractive quality or effect
The Ruby-throated hummingbird is found throughout Massachusetts during the warm months. This female paused on the branch of a nearby apple tree recently, providing me with a close-up of her luminous feathers.
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