A brachiosaurus is a gigantic dinosaur. They have long necks, which they use to eat leaves from trees too tall for other creatures to reach. They are found alone, in pairs or in herds of up to a dozen creatures.
If threatened, they can attempt to swat attackers with their long tails, or simply stampede over whatever is in their path.
A typical specimen is 80 feet long and 32 tons in weight.1
- Wikipedia:Brachiosaurus (extinct real-world animal)