Blood is mostly liquid, with numerous cells and proteins suspended in it, making blood thicker than pure water. The average person has about 5 liters (more than a gallon) of blood. A liquid called plasma makes up about half of the content of blood.
Feet and Beak. Like other birds in the raptor group, owls of all species use their beaks and talons to defend themselves. An owl's feet are equipped with particularly long, sharp and curved claws, which he can dig into an adversary and use like hooks to tear and rip at flesh.wls can't always successfully defend themselves from other animals, particularly their prey. Great horned owls, for example, are often found either dead or injured as a result of would-be prey like skunks and porcupines fighting back.
The great horned owl (Bubo virginianus), also known as the tiger owl (originally derived from early naturalists' description as the winged tiger or tiger of the air) or the hoot owl, is a large owl native to the Americas.ther raptors may nest more closely to the great horned owl. One golden eagle nest within only 8 m (26 ft) of an owl nest and there are cases of Harris's hawk and turkey vultures even nesting the very same tree as great horned owls.