National Geographic : 1960 Jul
Wary of an approaching boat, temporarily flightless trumpeters in molt flap wildly away. Man-made muskrat lodge (below) camouflaged the author at Red Rock Lakes refuge, permitting him to take his extraordinary photographs. So realistic was the blind that Mr. Truslow was able to take portraits of nesting trumpeters at less than 30 yards' distance. Here Dr. Charles Hansen, a biologist at the refuge, removes gear.