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A Review of Migratory Bird Flyways and Priorities for Management - TS No. 27
… national frontiers and be undertaken at international level through close coop- eration among the States involved. … pelagic seabirds undertake long- distance move- ments at sea. The level of our knowledge and understand- ing varies … tundra habitat cannot advance polewards as temperatures rise due to its position at the northern extent of the …