Wow, I think this ballerina was part bird!

A famous Russian ballerina has died at age 85 -- on the following link, you can see her dance in her younger years as the swan.  I've never seen such a remarkable resemblance of arms to wings....her movements are so delicate and graceful, you fully expect to see her sprout feathers and fly away:

http://www.cnn.com/2015/05/03/living/feat-russian-ballerina-maya-plisetskaya-dies/index.html