スミソニアン国立動物園のインスタグラム(smithsonianzoo) - 6月23日 02時56分

Did you know: To reduce predation, monarch butterflies overwintering in Mexico congregate as close as they can in tree branches and tree trunks. Counting each individual is impossible so scientists use a less conventional method and instead calculate the area that butterflies cover to determine the size of the population.#PollinatorWeek

[BIHAKUEN]UVシールド(UVShield) 更年期に悩んだら

>> 飲む日焼け止め！「UVシールド」を購入する