Brachiosaurus name means "Arm Lizard", was one of the largest and tallest dinosaurs ever found. It had a long neck, small head, and a short, thick tail. Grows up to 40-50 feet (12-16 m) tall. Brachiosaurus lived in the middle to late Jurassic period, about 156-145 million years ago. Brachiosaurus was about 85 feet (26 m) long, and weighed about 33-88 tons. It had a claw on the first toe of each front foot had a claws on the first three toes of each rear foot (each foot had five toes with fleshy pads). Some dating estimates have Brachiosaurus surviving until 140 million years ago, during the dawn of the Cretaceous period. `
Herds: Brachiosaurus probably traveled in herds and may have migrated when they wasted their local food supply. Eggs: Brachiosaurus have hatched from eggs, like other sauropods. Sauropod eggs have been found in a linear pattern and not in nests; presumably the eggs were laid as the massive reptiles was walking. It is thought that sauropods did not take care of their eggs. Brachiosaurus Life Span: Sauropod life span may have been as old as 100 years old. Brachiosaurus Defense: Brachiosaurus's best defense was size. In colluding, its long tail could whip away most predators. Also, Brachiosaurus had leathery skin, everyone though this wasn't much of a defense against predators, sharp Theropods teeth. They also had one claw on the front feet that were used protected young.