Nearly 200 years ago, Charles Darwin noted striking diversity among the finches of the Galapagos Islands, and his observations helped him propose the role of natural selection in shaping species. Today, some biologists focus their attention on a related group of birds, the finch-like capuchino seedeaters of South America, and their studies are deepening our understanding of the forces that drive evolution.
source https://phys.org/news/2020-11-birds-feather-flock.html
