Well, they do need it most of the time, but they can survive for weeks without it! Many animals would die in minutes without oxygen because it is required in the body to keep all our cells alive and working properly. Freshwater turtles (like our Painted Turtle) are able to switch to using an oxygen-free, or "anaerobic", process to keep their cells alive if there isn't enough oxygen in the water over winter hibernation. This is very risky because that anaerobic process
How do birds of prey survive the winter when many animals are hibernating and others are hidden under the snow? Many species, like osprey, will migrate to warmer areas, but other species like hawks, owls and sometimes eagles stay put and make a living during the colder months.
Owls don't need to see their prey in order to hunt - they can hear mice and other small animals scurrying beneath the snow and can pinpoint them with near-perfect accuracy! Hawks often eat birds a