cladogram
amillikan | December 27, 2008Scientists have long been torn about the exact evolution of birds since fossil and molecular dating techniques have yielded different answers. But by studying the DNA of birds in the parrot and cockatoo families, which do not migrate like most other birds, researchers were able to discern the times of species divergence and concluded that "parrots are an ancient lineage without any close evolutionary relationships," according to ScienceBlogger Grrl Scientist.