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
Violet Sabrewing
Purple Throated Mountain Gem
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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