Thus , the animators referenced an ostrich and a tiger for deciding on the raptors ' movements .
The animators determined that an animal of such size probably weighed as much as a fully grown Bengal tiger : approximately 500 pounds .
The animators referenced an ostrich and a tiger for deciding on the raptors ' movements .
The animators determined that an animal of such size probably weighed as much as a fully grown Bengal tiger : approximately 500 pounds .