Here are some examples and a video tutorial on a perspective drawing from a bird's eye view.
1. Watch the video and check out the website of artist Stephen Wiltshire
2. Practice drawing a city scene from a WORM'S Eye view AND a BIRD'S eye view
3. Practice using pen to create values and a variety of marks
4. Gather reference pictures or work from imagination
5. Create an original drawing that demonstrates EXTREME Perspective