Image from Richard Register's ecocities - Rebuilding Cities in Balance with Nature.
While the book focuses more on urban design, sustainable transportation and energy alternatives, there are some brief mentions of design to support nature. I loved this image (from page 123) showing a "birdhouse" in the city - a skyscraper designed for birds only (no people allowed)! Those two "dots" down in the right hand corner? Two people amazed by the building!