30 ft? (Score: 1) by email@example.com on 2015-01-15 16:42 (#2WQJ) 30 ft must make them pretty vulnerable to things like peregrine falcons.. Re: 30 ft? (Score: 0) by Anonymous Coward on 2015-01-15 17:37 (#2WQK) Where do you see 30 ft? Re: 30 ft? (Score: 1) by firstname.lastname@example.org on 2015-01-16 14:13 (#2WQR) 30 meters, 30 feet, it's all the same. This isn't rocket science, after all.But in the end, this whole study seems like somebody trying to win an Ig Nobel prize. Birds crash into planes because the planes are moving too fast for them to get out of the way? Whodathunkit?