These hummers are the most colourful.
An interesting thing about the birds is their eyesight. They have the usual RGB sensors the same as us but they also have a fourth sensor in the ultraviolet spectrum. The birds feathers refract the light to give the various colours. I saw some photos of a yellow bird with black shoulders. Under UV the black glowed a bright blue.
Violet Crowned Woodnymph
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Violet Sabrewing
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Purple Throated Mountain Gem
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Talamanca Hummingbird
An interesting thing about the birds is their eyesight. They have the usual RGB sensors the same as us but they also have a fourth sensor in the ultraviolet spectrum. The birds feathers refract the light to give the various colours. I saw some photos of a yellow bird with black shoulders. Under UV the black glowed a bright blue.
Violet Crowned Woodnymph
Violet Sabrewing
Purple Throated Mountain Gem
Talamanca Hummingbird
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