慢速英语:Migrating Birds Can't Find Their Way Home

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breeding ground – n. a place where animals go to breed

conservation – n. the protection of animals, plants, and natural resources

extinct – adj. no longer existing

habitat – v. the place or type of place where a plant or animal naturally or normally lives or grows

perish – v. to disappear or be destroyed : to cease to exist

sanctuary – n. a place where someone or something is protected or given shelter

species – n. a group of animals or plants that are similar and can produce young animals or plants : a group of related animals or plants that is smaller than a genus