The black heron, a jet-black bird found in southern Africa and Madagascar, has devised a devilishly clever way to catch its prey. When hunting for small fish in shallow water, the black heron uses its wings like an umbrella to create a patch of shade beneath it. 

(How this owl detects prey hiding under mounds of snow.)

Scientists believe that this behavior, known as canopy feeding, helps the birds hunt by making their prey easier to see. In the same way as wearing polarized sunglasses helps fishermen peer past the water’s surface, creating a personal patch of shade may help these birds get a better look at their prey. Shrouding themselves in a cloak