The Dollars and Cents of Bats and Farming - NYTimes.com
Every day, a bat eats much of its body weight in insects, many of them harmful to crops. A group of scientists led by Thomas Kunz at Boston University calculated how much more money cotton farmers in one region of Texas would spend on pesticides if bats weren’t present. Extrapolating from those numbers, they estimated that bats save American farmers somewhere between $3.7 billion and $54 billion a year, most likely about $22.9 billion.
This is a huge savings no one notices as long as bats flourish. But bat populations are severely threatened, especially the commonest species, the little brown bat, which is being decimated by a fungal disease called white-nose syndrome. The disease has spread all across the eastern half of the country and is now moving westward from Oklahoma.
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