Ornithologists with the Cornell Lab of Ornithology have stitched together the most complete avian evolutionary tree ever, unveiling surprising relationships and offering bird lovers the illustrated Birds of the World Phylogeny Explorer to trace lineages and evolutionary milestones. European bee-eaters (Merops apiaster). Image credit: Rashuli / CC BY 2.0. Understanding avian phylogeny is a fundamental aspect that underpins most ornithology research. But...
