In New Jersey, a newly discovered species of frog

Zoologist Brian Zarate first heard the creature's unfamiliar calls in 2003 while he and other researchers were working in the Great Swamp National Wildlife Refuge in Morris County. The strange series of "chucks and occasional groans" emanated from a small frog no bigger than the length of a thumb. One of them was captured and photographed by Zarate, then a state contract biologist with the Conserve Wildlife Foundation of New Jersey, who pondered the mystery along with his group. It couldn't have been the southern leopard frog, a species found widely in the Pine Barrens, they reasoned. It must be a northern leopard frog released into the wild, possibly by a high school biology teacher. At the time, the scientists didn't realize they were looking at a species that had not been described or mapped in any papers or field guides. Read more at http://www.philly.com/philly/news/20141201_In_New_Jersey__a_newly_discovered_species_of_frog.html#DrBtxL56LCrp0pEm.99