Among the three eagle owls, Yoll is the largest. Varya is smaller than Yoll, but slightly larger than Nafanya. The size does not depend on the age of the owl. Just parents Yoll from the northern edge of Russia, and the parents of Varya and Nafanya from the west. The more north the birds live, the larger and more massive they are than their kindred from warmer regions. And in birds of prey males are smaller than females. The oldest of the owls is Nafanya, he is 9 years old. Yollka will be 5 years old on May 1. And Varya will be in May for 2 years.