• WHY ONLY 10,000 BIRD SPECIES?

    2 days ago - By Ornithology

    Why are there only 10,000 species of birds when there are 25,000 species of fish and 350,000 species of beetles out of at least 900,000 species of insects. A 1959 paper by G.E. Hutchinson entitled Homage to Santa Rosalia or Why are There So Many Kinds of Animals? provides some ideas.
    Birds have only been around maybe 250 million years while insects came to be about 480 million years ago and fish 550 million years ago, so the latter groups have had more time to evolve as they adapted to different niches. The evolutionary history of modern groups of birds is complicated and requires a look...
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