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.
Broadly, there are two kinds of networks effects: Direct network effects: An increase in usage leads to a direct increase in value for other users. For example, telephone systems, fax machines, and social networks all imply direct contact among users. A direct network effect is called a same-side network effect. An example is online gamers who benefit from participation of other gamers. Indirect network effects: Increases in usage of one product or network spawn increases in the value of a complementary product or network, which can in turn increase the value of the original.