Just a note on relative exhibit sizes. Woodland Park's Brown Bear exhibit, widely viewed as among the best in the world, is only 12,000 square feet. Great use of hidden moats, borrowed views of landscape outside the exhibit etc. make it seem much larger. As always, it is not really the size that makes the space great--it's what is contained within the space. Varied terrain, digging substrate, a rushing stream, high vantage points, a sheltered cave, lots of dead wood to interact with and of course a deep pool with live fish make WPZ's Northern Trail great for bears and for viewers.
Roger Williams' planned exhibit, if indeed it is 25,000 square feet, will double Woodland Parks'. I sincerely doubt Calgary ever planned a 250,000 square foot exhibit, as suggested earlier. Maybe the whole Arctic complex, but in a relatively small urban zoo I cannot imagine devoting nearly 5 acres to one species, even one as large and as challenging as Polar bears (except of course elephants).
Roger Williams' planned exhibit, if indeed it is 25,000 square feet, will double Woodland Parks'. I sincerely doubt Calgary ever planned a 250,000 square foot exhibit, as suggested earlier. Maybe the whole Arctic complex, but in a relatively small urban zoo I cannot imagine devoting nearly 5 acres to one species, even one as large and as challenging as Polar bears (except of course elephants).

