There are still many unsolved problems about bird life, among which are the age that birds attain, the exact time at which some birds acquire their adult dress, and the changes which occur in this with years. Little, too, is known about the laws and routes of bird migration, and much less about the final disposition of the untold thousands which are annually produced.
Of all the ships that have been devoted to biological explorations of the sea, none has surpassed the endeavors conducted on board the U. S. Bureau of Fisheries steamer Albatross, during her 39 years of service from 1882 to 1921.
