Do bluebirds nesting in California's vineyards help grape growers by eating agricultural pests, or hurt them by eating insects that are beneficial? The researchers behind a new study found that bluebirds' presence is likely a net positive--and they did it by analyzing DNA in bird poop.
https://www.sciencedaily.com/releases/2016/11/161123141730.htm
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Oooh! I like falconry!
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