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.
Dromaeosauroides
The holotype tooth is roughly 25 percent larger than equivalent "Dromaeosaurus" teeth, from which a body length of or more was estimated for "Dromaeosauroides"; it may have been as long as . In an interview, Christiansen estimated its skull to be long and the animal's weight ; a Bengal tiger of the same length would weigh by comparison. As a dromaeosaur, "Dromaeosauroides" would have had a large sickle claw on its highly mobile second toe, like its relatives "Dromaeosaurus", "Velociraptor" and "Deinonychus". That group is closely related to birds, and the NaturBornholm interpretive centre houses a roughly life-sized sculpture of "Dromaeosauroides" covered in feathers. Later Chinese finds of well-preserved feathered dromaeosaurs indicate that the sculpture should have more and longer feathers to be accurate. Although some smaller dromaeosaurs may have been able to fly, flight was unlikely for an animal the size of "Dromaeosauroides".