The behavioral variation is in all probability similar to the exercise of hawks, which might experience the want to safeguard their nests and food stuff assets whilst actively breeding but are not generally ready to possibility their lives in attacking an eagle when migrating or wintering. The pink-tails migratory habits was viewed as as the likely trigger of this absence of effect, while great horned owls remained by means of the wintertime and was subject to winter season-pressure and better danger of starvation.