Nests are homes.
Meaning: This means that nests serve as a place for birds to live and raise their offspring. It's like saying, Nests provide shelter and protection for birds and their eggs or chicks.
Choice of Words: Nests are the structures built by birds to lay their eggs and raise their young. Are is the third person plural present tense of the verb 'to be.' Homes are the places where people or animals live. In this sentence, 'nests are homes' likens nests to human houses.
Alternative Expressions
Related Expressions