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.
1 Reading 5.2. Reading 5.2 â Population Bottlenecks and Founder Effects. Genetic Drift; When one trait becomes more common in a population due to random. chance (not because it is advantageous or non-advantageous) Population Bottleneck: is event in which a large number of a species is killed causing the. remaining population to reproduce.