Sentences with phrase «different beak sizes»
Different beak sizes does not mean a new species in the end their still birds.
http://religion.blogs.cnn.com/ Not exact matches
If we ask why birds on one isolated island have beaks different from those on others, the Darwinian answer is that they have adapted to the size and other features of edible seeds where they live.
He found that the food available on the Island that the finches fed on were different sizes and that the beaks were more adapted the size of seed available.
Like Charles Darwin's famous finches, which evolved a wide range of beak shapes and sizes to exploit the different foods available in the Galápagos Islands, these cichlids represent a textbook example of what biologists term an adaptive radiation — the phenomenon whereby one lineage spawns numerous species that evolve specializations to an array of ecological roles.
Changes in the size and form of the beak have enabled different species to utilize different food resources such us insects, seeds, nectar from cactus flowers as well as blood from seabirds, all driven by Darwinian selection.