When I observe birds flying and swimming in formation, I often think of synchronized dancers performing on stage or marching bands, but then I realize that humans are the ones imitating nature. We wear uniforms or dance costumes, so we will look as similar as two birds of the same species, right?
When photographing wildlife, you can’t plan this. You just have to be patient enough to sit and wait, following your subject and continually adjusting your focus. Note: something really cool usually happens after you pack up your tripod and start walking back to the car!