Derrick Hlabioa would like to know if birds collide when they fly in flocks.
When you watch a large flock of birds flying together it is a real source of wonder how the whole flock co-ordinates twists and turns with such precision, and without colliding. Scientists believe that individual birds are so in tune with the movements of the other members of the flock that if one bird changes direction, it results in a split-second ripple effect throughout the flock. Whole flocks are therefore able to synchronise their movements, banking and turning in the air with amazing precision. Birds - The Inside Story, Rael and Hélène Loon