スミソニアン国立動物園さんのインスタグラム写真 - (スミソニアン国立動物園Instagram)「Recent research calls for additional measures to protect European freshwater invertebrates, after recovery efforts stagnated. Smithsonian ecologist Ellen Welti shares her findings from the study and explains the connection to American waterways. Click the link in our bio to learn more! Image description: photo of a dragonfly perched on a branch.」8月27日 6時52分