The trustees of the Madrid Zoo heard that there were only twenty-seven whooping cranes left in the United States, and they determined that they must have one before the breed became extinct. A whooping crane was soon dispatched via air freight.

However,  when the American bird arrived at Madrid's airport, it refused to debark. Thus the trustees had to return empty- handed to their zoo. The moral of this story is  that cranes
in Spain stick mainly to the plane.

Now that's! a Groaner