A curious tree frog that breeds in the hollows of trees and feeds its young its own unfertilized eggs was rediscovered in Southeast Asia---nearly 150 years later.
The specimen, Jerdon’s tree frog, was last seen in 1870, according to National Geographic, but it was found alive in the forests of northeastern India. The frog lives in holes in trees and bamboo as high as 20 feet, making it difficult to spot.

In this Jan. 14, 2016, photo, preserved tadpoles of a frog named Frankixalus jerdonii, a new genus of frogs, are seen at Systematics Lab at the University of Delhi, Department of Environmental Studies, in New Delhi. Scientists have discovered the new genus of tree frogs in India thought to have been extinct for over a century. AP Photo/Altaf Qadri