The bird sounds like a lightsaber and comes in rare colors. Top that.
Create rainbow-hued dinoflagellates.
Sometimes the brain gets its wires crossed.
Bring on the brush pens.
The birds can distinguish hues in combinations of ultraviolet and visible light that puts our own technicolor vision to shame.
These optical illusions require a mix of the right weather, eye direction, and luck.
Colorful eggs aren't just for the birds.
It's so easy being green that these lizards kept evolving the same weird quirk.
Excerpt: Encyclopedia of Rainbows
Short answer: It could be in sight
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