Bucket-list birdwatchers attending the Harney County Migratory Bird Festival April 10-13 can set out before sunrise to see 100 bald eagles fly away from a secret roost. Or people can sleep in and walk ...

A long, long time ago, marsupials the size of small trucks, 2-meter-tall "thunder birds" and 5-meter-long venomous lizards roamed Australia. These animals—and more—were Australia's megafauna.

They were the ancient Australian megafauna—huge animals that roamed ... a huge flightless bird; a wombat-like creature the size of a rhinoceros; and a seven-foot-tall kangaroo with a strangely ...