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migratory species
desert.	移栖种
environ.	迁徙物种
tech.	移栖物种; 洄游物种; 洄游类
UN, biol., sec.sys.	洄游物种; 迁移物种; 移栖物种
zool.	迁栖物种

migratory species: 7 phrases in 3 subjects

Ecology	1
Name of organization	2
United Nations	4