Mysterious Birds Dive in Sync During a Lunar Eclipse

Scientists were able to capture never-before-recorded data on the behaviour of theelusive American black swift bird. Among other things, they confirmed that the birds spend nearly all their time flying when not breeding and that they likely rely on moonlight to help them hunt. The team also managed to record them right in the middle of a lunar eclipse, during which time the birds abruptly dove toward Earth.Black swifts (Cypseloides niger) are considered some of the most mysterious birds around.