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 This material may not be published, broadcast, rewritten or redistributed.)
Johnston Investigation Concludes Five Allegations Substatiated
An investigation into allegations that a Duluth school board member threatened the district's superintendent and other board members concludes that five of six claims are warranted. A 67-page report details the allegations against school board member Art Johnston released to Eyewitness News on Friday....
Denfeld High School Debuts In-School Food Pantry, Clothes Closet
A new program at Denfeld High School in Duluth aimed at making sure students don't go hungry or without clothes, made its debut on Friday. The Hunter Hut food pantry and clothes closet is the first of its kind in an eight-county radius because it gives students the chance to shop for free groceries and clothing right at school....
Superior Police: Officer's Use of Force Justified
The Superior Police Department says an internal investigation has found an officer's use of force was justified in an arrest seen on a controversial dashcam video. However, the officer was given a 10-hour unpaid suspension for "vulgar and unprofessional" communication during the arrest.
Rice Lake Township Makes Moves To Become a City
After the City of Duluth brought up the idea of annexing Rice Lake Township, township leaders are continuing their efforts to turn the township into a city.
Washburn Co. Sheriff: Concrete Damaging Tires on Hwy. 53
The Washburn County Sheriff's Office says five vehicles have suffered tire and wheel damage due to concrete problems on U.S. Highway 53. Sheriff Terry Dryden said county highway workers are checking to see what can be done.