More than 40,000 snow geese, 15,000 sandhill cranes and 15,000 ducks cast a spectacular image as they prepare to migrate away from the Bosque Del Apache National Wildlife Refuge along the Rio Grande river in New Mexico. The snow geese, sometimes seen in Britain, migrate south from Canada,...
If winter went on and on, frogs and turtles would deplete their energy reserves and, being unable to feed, die of starvation. Or, metabolic waste products that accumulate in the body during the winter would build up, reaching toxic levels. "Frogs and turtles that live in seasonally cold pla...