Galápagos had no native amphibians. Then it was invaded by hundreds of thousands of frogs

Scientists are only beginning to grasp the scale of the issue and understand what impact the tree frogs may have on the islands' rare wildlife

On the way to her office at the Charles Darwin research station, biologist Miriam San Jose crouches down near a shallow pond shrouded by vegetation and reaches deep into the foliage, pulling out a small green plastic box recorder.

She left it there overnight to capture the infamous croaks of a Fowler's snouted treefrog (Scinax quinquefasciatus), known to Galapagos scientists as an invasive threat, with repercussions researchers are only beginning to grasp.