1.   In the case of the rare hooded crane, the introduction of a foreign herpes virus has threatened the remaining wild population.

2.   -- How was Eduard, a rare Siberian crane, relieved of the pain he suffered from severe arthritis?

3.   Eduard, a rare Siberian crane, suffered from severe arthritis for five years.

4.   Vietnam is expanding a wetlands sanctuary to encourage breeding by a rare crane that napalm, bombs and defoliants almost killed off during years of war.