Over the past 20 million years some of your ancestors have begun to explore and colonize drier habitats in and around the forest where there are new potential food sources. Your group has been very successful and is now much larger than other amniotes. You have new adaptations to help you survive and reproduce in these drier environments.
• Large herbivores first appear
• Tropical forests are shrinking
• High oxygen levels are present
• Small reptiles live in the forests