The females of the latter two species are an unimaginative brown, and the female goldfinch is a much paler yellow than the male. Many fish are also distinctive in their color differences between the sexes. The brilliantly colored darters of the southeastern streams are dramatic in their contrast between males and females. In the male Christmas darter of Georgia and South Carolina, bright red and green bars are present during the breeding season. Males of the redband darter of Tennessee sport bright blue and red orange on their fins.
Female darters are generally drabber in appearance.
Interestingly, the color of most mammals is restricted to whites, browns, grays, and black, suggesting that color blindness is a common trait within the group. Some or all of the higher primates, which would include humans and baboons, can see colors. The brightly colored rump region of male baboons is the most obvious display of color among the mammals, except for hair color among some of today's teenagers. Plants also use color to great advantage, the various forms of color advertising being the most apparent. Brightly colored flowers attract insects that are essential for pollination in some species.