Billions, if not trillions, of two groups of noisy flying insects are expected to emerge from the underground in 17 U.S. states in April in a rare natural phenomenon not seen since 1803.

For the first time in years, a rare bird is flying free in the forests of Hawaii ... "There's facilities for insects," Pribble says. "There's facilities for plants. Everything that is native to Hawaii ...

GRAY, Tenn. (WCYB) — Workers at the Gray Fossil Site and Museum made a rare discovery of a giant flying squirrel fossil. This squirrel is estimated to have lived 5 million years ago. Museum ...

With far fewer than 50,000 examples built over a decade and only a small percentage still around, the Flying Cloud is a very rare classic. They're so scarce that less than two dozen Flying Clouds ...

They emit a series of supersonic cries through the mouth or nose and detect flying insects by the echoes reflected back ... and rabies in humans resulting from such bites is extremely rare. But, bats ...