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New frog discovered in New York City
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New frog discovered in New York City
Amazed biologists have uncovered a new species of frog in the concrete jungle of New York.

The mottled green creature was for years mistaken as belonging to a widespread variety of the leopard frog. But now scientists realise this is new.

"For a new species to go unrecognised in this area is amazing," says University of California, Los Angeles biologist Professor Brad Shaffer.

New York is surrounded by wetlands and other nature-filled areas. But this latest urban creature appears to have chosen one of the grittiest corners as the centre of its habitat: Yankee Stadium in the Bronx.

In the journal Molecular Phylogenetics and Evolution, Shaffer and other scientists compared the frog's DNA to that of other leopard frog species in the region. That's when they understood they were looking at a new type of frog.

"Many amphibians are secretive and very hard to find, but these frogs are pretty obvious animals," says Shaffer.

"This shows that even in the largest city in the US, there are still new and important species waiting to be discovered."

Lead paper author Cathy Newman, now of Louisiana State University, was studying leopard frogs when her colleague Jeremy Feinberg at Rutgers University asked her to probe some "unusual frogs."

"There are northern and southern leopard frogs in that general area, so I was expecting to find one of those that for some reason had atypical behaviours or that were hybrids of both," says Newman.

"I was really surprised and excited once I started getting data back strongly suggesting it was a new species. It's fascinating in such a heavily urbanised area."

Feinberg says he'd been immediately curious.

This frog gave a repeated croak, not the "long snore" of other leopard frogs.

"When I first heard these frogs calling, it was so different, I knew something was very off," says Feinberg.

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