Falcons, ravens, crows, eagles, cuckoos, pelicans, sparrows, jays, rooks, columbidaes, cranes, budgerigars, jackdaws, magpies - these are types of birds - some have strange names that even somebody can say they ain't birds, but they definitely are. Then what stranger than a strange name? What is much weird than how they may look in appearance? What is more intriguing than how many of them do fly? ... The answer might be simply when then fly in a flock of different birds instead of the usual one type of flock. The State of Tennessee back in 2013 witnessed the worst encounter of this queer phenomenon in daylight and moonlight. No one wanted this, nobody wished for this, but it just happened - to their frightening expectations. It only started with one bird... soon, many others followed the horrifying trend in creating the disasterous havoc.