Answer:
True
Explanation:
Whooping Crane of North America are one of the most endangered species and in order to save them a recovery program was launched by the Canadian and American in 1967.
After the successful implementation of this recovery program, the number of crane birds started increasing. At present there are 15 species of cranes in the world. However, still the program needs to be continues for several years till the population of Cranes reach a safer level.
Hence, the given statement is true
