National Geographic : 1937 Jun
HUNTING WITH A MICROPHONE which we might record, so we stayed for three days and kept our microphone and sound mirror ever ready. But itwasnottobe so simple and we were doomed to disappointment. Thereupon we moved on to Lower Red Rock Lake, Montana, a few miles to the westward, where, we were in formed, a pair of swans had reared young the year before. This lake is about four miles long and three miles wide and is dotted with innumer able marshy islands. At first we could see no signs of swans. But, climbing to the roof of the Montana Gun Club, with our powerful binocu lars we soon located seven birds, two pairs of which seemed to be nesting. A cruise around the lake in a HERE IS THE HOME OF ONE OF AMERICA'S RAREST BIRDS-THE TRUMPETER SWAN Dr. Allen discovered it about 15 feet from the open water of Lower Red Rock Lake, Montana, on one of the marshy islands which dot its surface. The nest was about six feet across and two feet high. duckboat showed that both had nests, though one was empty; the other con tained two infertile eggs and the broken shells of two others from which the cygnets had hatched and been led away by their parents. We were now quite hopeful of being able to secure a record of the voice of the trump eter swan, though we could not get the sound truck within a half mile of the near est pair. For four days we remained at the Montana Gun Club with the microphone ready, but, except for one trumpet call dur ing the night, we heard nothing from the swans. Our time was almost exhausted and still we had failed to catch the voice. TRUMPETERS TRICKED When the last morning was at hand we staked our all on one last scheme. We con cealed the sound truck behind one of the buildings and ran the cable to the edge of the lake, where we set up the sound reflec tor and the blind with the Akeley camera inside. Then we made a little cylinder of fly-screening and set it among the rushes, fastening a string to the top of it and run ning it over to the blind.