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Humans are colour-blind compared to birds and many other animals.
Put simply, humans have three types of retina colour cones, and birds have four. This makes us sensitive to red, green and blue light.
A new study shows that tiny hummingbirds see colours we can’t even imagine!
Birds have a fourth, that lets them detect ultraviolet light.
While humans have just one non-spectral colour – purple – birds can theoretically see up to five: purple, ultraviolet+red, ultraviolet+green, ultraviolet+yellow and ultraviolet+purple.
The hummingbirds rely on their heightened colour sense to find food, dazzle mates, escape predators and navigate diverse terrain, these scientists said.
In fact, said evolutionary biologist Mary (Cassie) Stoddard at Princeton:
“Humans are colour-blind compared to birds and many other animals.”
We have always loved the Hummingbird at Our Earth, and this somehow makes them that much cooler!
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