Question

colours of bird and survival advantage do they get from them

Answer 1

The colours of birds are important for their survival due to two reasons: Attracting a mate and Escape from predation

Males of most species of birds are more colourful than females to attract mates. This is essential for the creation of offspring and the continuation of the species.
Another advantage is the escape from predation. By camouflaging, birds are able to escape from the eyes of their predators. In the colourful tropical areas birds are brightly coloured while the birds living nearer ground, have shades of brown and less elaborate colouring for the same reasons.

Answer 2

A bird’s bright colours, makes it attractive to its mate. Selection of sexual partner among birds, usually depends upon attractiveness of plumage. 

Bright or dull colours of their plumage, helps in camouflage from predators.

 

For example, parrots have bright, leafy green feathers, which helps them blend in easily with trees and shrubs. It helps to escape attention from predators. Those birds which are found hopping among dried leaves and twigs have a dull brown colour which makes them look part of the natural habitat.