Brontosaurus
"Brontosaurus" was a large, long-necked quadrupedal animal with a long, whip-like tail, and forelimbs that were slightly shorter than its hindlimbs. The largest species, "B. excelsus", weighed up to and measured up to long from head to tail. For comparison, the current largest land animal, the average male African bush elephant is 3.20 m (10.5 ft) tall at the shoulder and has a body mass of 6,000 kg (13,228 lb) or 6.6 short tons.
Albertosaurus
"Albertosaurus" was smaller than some other tyrannosaurids, such as "Tarbosaurus" and "Tyrannosaurus". Typical "Albertosaurus" adults measured up to long, while rare individuals of great age could grow to be over long. Several independent mass estimates, obtained by different methods, suggest that an adult "Albertosaurus" weighed between 1.3 tonnes and 1.7 tonnes (1.9 tons).