Which of these birds do you find most interesting?

1. The kea (New Zealand), the world's only cold-weather parrot, loves to swing on car antennas and sled down the snowy roofs of ski lodges. The bird's favorite sport, though, is to get inside a lodge through its chimney and then trash the joint in search of food.

2. The common loon (northern North America and Greenland) can dive more than 250 feet below the water's surface.

3.  The widespread sapsucker bores holes in trees, then slurps up the sweet sap.

4. A malleefowl (Australia) lays eggs in a nest full of rotting vegetation. The decay gives off heat to keep the eggs warm; the male bird checks the temperature often and adjusts the pile as necessary.

5. A male sand grouse (Asian and African deserts) soaks himself in water, then flies back to the nest so his chicks can drink from his feathers.