Updated: 07/04/2014 4:51 PM
Created: 07/04/2014 4:49 PM WDIO.com
MOORHEAD, Minn. (AP) - Scientists in northern Minnesota are trying to decode frogs' sounds, to understand why the amphibians' populations have been shrinking.
A Minnesota Public Radio report says from 2002 to 2011, frog populations across North America were down 4 percent. Populations of at-risk species fell nearly 12 percent.
Michael Adams is a research ecologist with the U.S. Geological Survey. He says disease, pesticides and habitat loss are generally known to be factors, but scientists wanted more specifics.
They've been recording frog sounds in forests such as the Tamarac National Wildlife Refuge in Moorhead. They set up audio recorders to capture months' worth of sound, and they're analyzing the findings to determine how populations are changing.
He says the biggest surprise so far is how the population of even healthy frog species is decreasing.
Information from: Minnesota Public Radio News
(Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)
New York Officials: Doctor has Ebola, 1st in City
A Doctors Without Borders physician who recently returned to the city after treating Ebola patients in West Africa has tested positive for the virus, according to preliminary test results, city officials said Thursday. He's the fourth confirmed case in the U.S. and the first in the nation's biggest city.
Minn. Officials Walk Through Mock Ebola Scenario
More than 100 representatives from several Minnesota agencies are going through a mock exercise to review the state's preparedness in the event of a case of Ebola.
Woman Charged with Murder after Stabbing in Stoney Brook Township
There is new development in the murder case on the Fond du Lac Reservation. The husband of the victim has been released, and he is facing no charges. Instead, the woman who police had been searching for, Lydia Marie Barney, has been charged with second degree murder.
No Injuries in Early Morning Esko Structure Fire
Deputies say there were no injuries in an early morning structure fire in Esko Thursday. Crews responded to the 200 block of Nelson Road around 4:30 a.m. Deputies said the cause of the fire was not suspicious.
1 Dead, 1 Arrested in Cass County Crash
An Aitkin County man is in custody and another person is dead after a two-vehicle head-on collision in Cass County.