スミソニアン国立動物園のインスタグラム(smithsonianzoo) - 12月30日 01時46分

Smithsonian Migratory Bird Center scientists have to think small to track long shorebird migrations. They tracked tiny shorebirds using GPS tags weighing just 3.5 grams. The GPS tags help scientists understand where birds migrate and what might affect their migrations. #WeSaveSpecies

[BIHAKUEN]UVシールド(UVShield)

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