Study: Global bird species estimate doubled
Joelle Harms
New research led by the American Museum of Natural History (AMNH) suggests there are about 18,000 bird species in the world, nearly twice as many as previously thought. The study, published Nov. 23 in the journal PLOS ONE, focuses on “hidden” avian diversity — birds that look similar to one another, or were thought to interbreed, but are […]
