Oahu invasive species group probes coqui reports September 13, 2012 at 8:01 PM HST - Updated June 28 at 1:50 AM HONOLULU (AP) - The Oahu Invasive Species Committee is investigating 12 reports of coqui frogs submitted by people who participated in a "Go Out and Listen Night." The committee said in a Facebook post Thursday 133 people participated in the coordinated effort to listen for the frogs. The committee had asked Oahu residents to go outside and listen for the frog's nocturnal mating call on Wednesday between 7:30 p.m. and 8 p.m. The committee says what starts out as one mating call could quickly turn into "an earsplitting chorus" if the frogs aren't reported immediately. Coqui frogs reproduce quickly in Hawaii because they don't have natural predators here. The frogs are well established on the Big Island. Many have been showing up on Oahu after hitchhiking their way in plants and other cargo. Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.