<Li> Double scratch: hopping forward and then backward using both feet to scratch (often towhees, sparrows, juncos) </Li> <Li> One - footed scratch (grouse, quails, wild turkeys, domestic chicken) </Li> <Li> Reproduction and related <Ul> <Li> Cradling and turning eggs during incubation . Birds lacking a brood patch incubate the eggs with their feet--grasping one or even two of them (gannets, boobies) or keeping them on the top surfaces of their feet (penguins under a pouch of belly skin, murres). </Li> <Li> Courtship (sage grouse), including aerial courtship (bald eagles) </Li> <Li> Building nests (with help from the bill) </Li> </Ul> </Li> <Ul> <Li> Cradling and turning eggs during incubation . Birds lacking a brood patch incubate the eggs with their feet--grasping one or even two of them (gannets, boobies) or keeping them on the top surfaces of their feet (penguins under a pouch of belly skin, murres). </Li> <Li> Courtship (sage grouse), including aerial courtship (bald eagles) </Li> <Li> Building nests (with help from the bill) </Li> </Ul>

Why birds that walk on the leaves floating on the surface of water have wide feet