Bird Sanctuary Escape

Outside the summer, studying at school is over and it is time to various trips with the class. You rented a bus and went to a bird sanctuary, which contains almost all the existing species of birds. You really liked it here, and you're behind the group, examining every detail. The reserve is closed to the public, thinking that no one is inside already. You must find a way out, because at night it is very cold and you're hungry.