That study was quite controversial and it’s estimates are not widely
accepted. The morphology method used, in particular, is a bit bogus. The
work didn’t recognize or name 18,000 species, rather it speculated that
there are 6-8,000 ‘hidden’ species that haven’t been split yet by any
taxonomic authority.
Frank Fogarty
Oakland
On Sun, Mar 31, 2019 at 5:58 AM Gregory Luce via VA-bird <
va-bird@xxxxxxxxxxxxx> wrote:
According to this study released in December 2016, latest research does
indeed indicate at least 18,000 species. This came a surprise to me too as
I had always heard 10,000 as the approximate number.
https://www.amnh.org/about/press-center/new-study-doubles-the-estimate-of-bird-species-in-the-world
--
Gregory Luce
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