World's Longest Flight: Swift Birds Found to Travel 10 Months Straight!

Covering thousands of miles and staying most of the time flying, the routine of birds was initially hypothesized by Ron Lockley, a British researcher in the 70s. It was still a question whether it can really stay that long, but a recent study claimed that it could really happen, and the common swiftlets are now holding the record for the longest natural sustained flight.