Bird flower pollen is distributed with more than 600 nm wavelength, because the need is different from a plant that has a reflection wave radiation at 530-550 nm.
The flowers are pollinated birds were distributed over a wavelength of 600 nm, because I want to be different from the leaves of the plants are reflected radiation at 530-550 nm.
The bird is a flower with pollen distribution of wavelength than 600 nm. Due to the need to differ from the leaves of the plant with reflection wave radiation in 530-550 nm.