In one species of bird, there are three varieties of feather color. what is this an example of?

The question says, in one species of bird, there are three varieties of feather colour. What is this an example of? This is an example of condominance. Condominance is a type of dominance in which alleles of a gene pair in a heterozygote are fully expressed. This brings about an offspring that is neither dominant or recessive and the traits all get expressed.

That is true it is called an aftershock