ナショナルジオグラフィックのインスタグラム(natgeo) - 6月10日 09時00分

Few sights induce nostalgia like the flickering glow of fireflies at night. These beloved, bioluminescent insects (also known as lightning bugs) are in trouble. Their populations are declining around the world as the threats against them pile up. Learn what you can do to ensure that fireflies continue to light up our backyards for generations to come at the link in bio.

Photograph by @davidliittschwager, Nat Geo Image Collection

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