In 1868, the naturalist Charles Darwin wrote that differences in plumage coloration between male and female birds of the same species were likely the result of sexual selection: Female birds—he used the peahen and peacock as an example—seemed to prefer the showiest males. A new study of thrushes offers evidence that another dynamic is at play, and helps explain why this phenomenon, called sexual dichromatism, is not universal among birds, its authors say.
Click here for original story, Male/female plumage differences in thrushes promote species recognition
Source: Phys.org