The Barn Owl Tyto alba

A baby Bison tries to nurse while its mother walks. Yellowstone National Park, Wyoming, USA. Latin name: bison bison

Mature male elk with antlers walking in snow at Blacktail Deer Plateau Yellowstone National Park

African Buffalo at Lake Nakuru, Kenya

Grizzly bear Ursus arctos - captive snarling

Close-up of a Leo zodiac sign

Illustrative image of businessman showing red cloth to bull

A hippopotamus opening its mouth

Aggressive Tyrannosaurus Rex growling, white background.

Aggressive Tyrannosaurus Rex dinosaur in the desert.

Aggressive Tyrannosaurus Rex dinosaur walking in the desert.

Flora & Fauna - line art - a 19th century engraving Animal Skunk - a member of the Weasel family. No explanation needed. Although it should be noted that they exhibit aggressive warning behavior before spraying.

Giganotosaurus dinosaur, artwork

Tyrannosaurus rex dinosaur, artwork

A black and white version of an illustration of a fierce looking bear

Giganotosaurus dinosaur skeleton, artwork

Bistahieversor attacking a pair of Pentaceratops.

Tyrannosaurus rex fighting against Styracosaurus dinosaurs.

Zhenyuanopterus pterosaur from the Cretaceous Period.

aggressiveness, blurred motion, barking, animal, aggressive