Lev Ivanov's choreography for the famous Dance of the Small Swans (or Dance des petits cygnes) was meant to imitate the way cygnets huddle and move together for protection. The dance requires rigorous rehearsing to build stamina and to achieve near-exact unison.
Dancers (left-right) are Carli Samuelson, Madison Abeo, Angelica Generosa and Leta Biasucci.
Our most watched YouTube video is a rehearsal of this exact choreography: https://www.youtube.com/watch?v=-5Yp-vToI2E
Choreography: Lev Ivanov Music: Peter Ilyich Tchaikovsky