Answer:
they can fly , which requires alot of energy & keep their body warm with their feathers
The predator numbers for the deer will start to drop, due to a lack of food available. The vegetation that deer eat will increase, due to a lack of deer to eat it & so it will thrive untamed. This may cause certain animals to thrive & increase their respective predator counts & so on.
Speed. Reaction. Function. Alter.
