アメリカ自然史博物館さんのインスタグラム写真 - (アメリカ自然史博物館Instagram)「This EntoMonday, meet the domesticated silkworm moth (Bombyx mori)! 🐛The critter has been spinning silk for human clothing for millennia. In fact, silk production began in China more than 4,500 years ago! This caterpillar, and many others, secrete silk from glands on their heads to anchor themselves to plants and to eventually build cocoons. A cocoon is spun from a single thread that measures up to a half mile (0.8 km) long and it takes more than 2,500 cocoons to create just 1 lb (0.5 kg) of silk! Native to Southeast Asia, this species produces the finest, most valuable silk. While it no longer lives in the wild, you can spot these fascinating critters in the Museum’s Solomon Insectarium! Photo: Mark Vuaran, CC BY-NC 2.0, flickr #entomology #amazingnature #animalfacts #didyouknow #science #wildlife」9月25日 23時38分