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Definition of Tree swallow
1. Noun. Bluish-green-and-white North American swallow; nests in tree cavities.
2. Noun. Of Australia and Polynesia; nests in tree cavities.
Exact synonyms: Hirundo Nigricans, Tree Martin
Generic synonyms: Swallow
Group relationships: Genus Hirundo, Hirundo
Generic synonyms: Swallow
Group relationships: Genus Hirundo, Hirundo