How would a sudden decrease vole population affect the barn owl population?
It would decrease the barn owl population by 25% at least. Voles are often cited as the favorite prey of barn owls in many areas. Researchers have even documented that barn owls prey selectively on pregnant female voles, thus affecting more efficient rodent suppression. At a weight of 50 grams, voles are an excellent prey size for barn owls, which swallow their prey whole. One family of owls will consume up to 3000 of these rodents annually.
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