The researchers were able to back up their scientific guesses using information obtained as a result of attachment to the songbirds special sensors. About 20 devices attached to Vermivora in May 2013.
Thanks detectors environmentalists traced an interesting trend: the birds left their places of nesting, flying 700 kilometers to the south of the Gulf of Mexico. On the day after their departure to the central part of the United States struck a wave of deadly tornadoes.
“This is a very small songbirds – they weigh about nine grams. And what they came back with geolokatorami, was a great success this season “- said Dr. Henry Striba the University of California.
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