スミソニアン国立動物園のインスタグラム(smithsonianzoo) - 7月26日 01時33分

?Purple martins on the east coast of North America almost always choose to nest in bird houses provided by humans. Purple martins on the west coast of North America prefer natural cavities in trees. At the Smithsonian Conservation Biology Institute, we have a purple martin hotel—groups of gourd-shaped nests for the migratory birds to hatch eggs and raise chicks in. #WeSaveSpecies

[BIHAKUEN]UVシールド(UVShield)

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