Species Go Back to Ancient Times: Roosters Are Weak? I Return to Ancient Tyrannosaurus Rex

Earth comes online to a different world, and each country must select a participant to enter the game. Participants need to select a creature on behalf of the country for retro-ancient observation. All the selected creatures will be released to the ancient continent. While returning to ancient times towards their ancestors, they will also start fighting in the ancient continent. The more powerful the creature is after returning to ancient times, the greater the chance of survival, the longer it survives, and the more likely it is to win. Otherwise, it will fail and cause its country to suffer natural disasters. The tall elephant, the extremely fast cheetah, the lion, the king of the savanna... Every creature has extremely powerful strength. In this world where there is zero knowledge of prehistoric creatures and everyone thinks that creatures that are strong now will definitely be strong in ancient times. Baizhou did not choose those powerful predators like participants from other countries, but chose the humble fighting cock! Looking at the thin fighting cock, the people of the Dragon Kingdom felt very desperate. [Did I read it wrong? Baizhou chose a chicken? [It's over, we are going to be the first country to be eliminated] Everyone thought that the fighting cock would be the first species to be extinct. However, as time went back, everyone found that the fighting cock became larger and larger, and its beak turned into a mouth full of fangs. It turned into a Tyrannosaurus rex in ancient times. When facing the powerful saber-toothed tiger that attacked, it just drove it away with its roar. Only then did I realize what a wise choice it was to choose a fighting cock. Tyrannosaurus Rex: I have no problem with you calling me Brother Chicken before I go back to ancient times, but what should you call me after you go back to ancient times?