During that time he lived with the birds on the lonely Texas marshes in winter. In early spring he took off by plane in advance of their migration and intercepted them along the Platte River in Nebraska. He traced their migration route through Texas, Oklahoma, Kansas, Nebraska, the Dakotas and into Saskatchewan where they disappeared into Canada's north country. He flew thousands of miles in the far north in a vain search for their nesting grounds.
People often ask how on earth the cranes know enough to go right to the refuge to spend the winter. The answer is that the presence of the whooping cranes there is historic and was one of the main reasons why the refuge was established in 1937.
As a result of Allen's recommendations, numerous steps have been taken to aid the cranes. One of the main objectives has been to find the nesting grounds and learn whether there are any factors there which are limiting the increase. Canada has announced that when the nesting area is found it will be declared an inviolate sanctuary. Plans are now being made for a systematic search of the area next summer.
Each fall the refuge men are waiting eagerly as the cranes come back in little groups. By early December they are all in and the refuge men make an exact count by flying over them in small planes. In recent years the flock has returned with an average of four young birds. But usually a few of the parents are lost, some from being shot, and others from unknown causes. Sometimes the population fluctuates perilously. The gain or loss of a single bird is vital to the survival of the race.
Last year there was a gain. Twenty-one whoopers took off for the North in the spring and in the fall all 21 returned, bringing three gawky offspring with them. This fall more eyes than ever will be on the alert in the country's most unusual bird-watching program.