Other birds may be more attracted to the colors of their own plumage as those could indicate a potential mate or another bird that is surviving well. 1  Most bright colors, however, can be used to attract birds, with certain bird species being more attracted to particular shades. 1  Red and Pink: Hummingbirds. 2  Orange: Orioles, hummingbirds. 3  Yellow: Goldfinches, warblers, hummingbirds.  Blue: Bluebirds, jays.
This phenomenon is called the founder effect. The founder effect is generically a loss of genetic diversity. But specifically, it refers to limited genetic diversity that occurs when a small group of individuals from a genetically diverse population of some species migrates away and forms a new colony.
Founder Effect: When a new colony of individuals is started from just a few members of the. original population. All of the offspring will have the similar traits as the âfounders.â. Genetic drift can cause big losses of alleles from the gene pool of small populations.