Yes, there may be hundreds of billions of birds on the planet compared
to 7 billion people. However, I think there are about 10,000 species
of birds compared to 1 taxa of us. Given the population size of many
particular species, I suspect that the number of humans is probably
equal to the number of individuals in the "bottom" 7,000 bird species.
That is a scary thought.
I wonder if the estimates of the number of birds includes the billions
of chooks and budgies etc that we keep in cages. How does the combined
wild population compare to the combined captive population?
Regards, Laurie.
On Wednesday, October 10, 2007, at 10:38 PM, david taylor wrote:
I'm reading an interesting book at the moment and it prompted a
question.
i wondered just how many birds there are in say Australia or on
planet earth. I'm talking total numbers rather than species. i googled
and read a couple of interesting pieces on the subject including some
research from Gaston and Blackburn which suggests there are between
200 and 400 billion birds on earth! Wow! Another study estimated 100
billion plus birds on earth. In comparison there are around 6.6
billion people on earth, so our avian friends well and truly outnumber
us.
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