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.
They make the familiar âhoo hooâ call associated with owls. Great-Horned Owls feed on waterfowl, rabbits, squirrels, marsh birds, rodents, reptiles, and amphibians. They nest in tree cavities, nest boxes, and cliff ledges, as well as the old nests of crows, squirrel, and hawks.hough their name implies that they make a screeching sound, their call is more comparable to the âwhinnyâ of a horse. Eastern Screech-Owls hunt at night and eat small rodents, flying insects and small birds. Year-round residents of Maryland, they are fairly common in suburban areas.