Camouflage

A camouflage material made from natural plant dyes can conceal objects in both visible light and ultraviolet, which could be useful for hunters trying to avoid being spotted by birds that can see in UV.

To make the material, Anowar Hossain at RMIT University in Melbourne, Australia, extracted dyes from a range of plant species, including Honduran mahogany, mango trees and tea plants, and used them to print a leafy design on cotton fabric.
–New Scientist