Migratory Birds of the Great Lakes University of Wisconsin Sea Grant Institute
 about habitat birds + science 20 birds
aerialist raptors
copyright UW Sea Grant, writer: L. Wiland, design: T. Yao contact us credits

Great Blue Heron — Water Connection, page 3

• Unlike some other water-loving avian predators, like ospreys, Great Blue Herons are blinded by light reflections off the water’s surface. Research shows that their foraging success is greater on cloudy, overcast days than in full sunlight.

• Herons lack the oil glands that are so prominent in other kinds of water birds. Instead, they grow special patches of powder-down feathers, which crumble into powder that the bird combs into its feathers to serve as insulation and waterproofing.

ML Reeb writer: Laurence Wiland design: T. Yao