brachiosaurus was the tallest land animal to walk the earth. front legs of this animal were taller than the rear ones, allowing brachiosaurus to munch happily on plants. it had to eat all the time to keep alive. there is also the fact that for a BIG dino, it laid tiny eggs, leaving the cute,adorable babies to fend for themselves. they travel in herds too. this model should be 8 inches tall and 13 inches long. there is a smaller version that should be 6.2 inches tall and 6 1/2 inches long. picture below.