Terror birds lived in N. America, Europe, ands S. America during the Tertiary Period.
- There was a pack of them with the Sabertooth Tigers (which they had theropod meat in their mouth), when Jack, Wilson, and Kenny look up after looking at the big cats, they start to run in the jungle as the predators start to chase them, soon as the big cats are about to fall in, Kenny gets a strong stick and pokes at their paws, causing the cats to fall in the chasm, and the chase was still on, the terror birds trip over a log and they start to twitch. Soon the three men start to continue the search for Ann Darrow (Naomi Watts) and Brittnay Hornsby (Kristey Swanson).