Monarch butterflies rebound 69 percent in Mexico, but numbers still dangerously low

January 27, 2015 2:45 PM

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Monarch butterflies rebound 69 percent in Mexico, but numbers still dangerously low

FILE - In this Jan. 4, 2015 file photo, Monarch butterflies perch on a twig at the Piedra Herrada sanctuary, near Valle del Bravo, Mexico. The number of Monarch butterflies that reached wintering grounds in Mexico has rebounded 69 percent from last year’s lowest-on-record levels, but their numbers remain very low, according to a formal census by Mexican environmental authorities and scientists released Tuesday, Jan. 27, 2015. (AP Photo/Rebecca Blackwell, File) (The Associated Press)

FILE - In this Jan. 4, 2015 file photo, swarms of Monarch butterflies hang on tree branches, in the Piedra Herrada sanctuary, near Valle de Bravo, Mexico. The orange-and-black butterflies are suffering from loss of milkweed habitat in the United States, illegal logging in Mexico and climate change. ...

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