ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by Joel Sartore @joelsartore | Gopher tortoises face a potentially deadly journey when they cross busy highways, so please slow down in known tortoise areas. The creatures play a key role in helping other species survive; the burrows dug by this reptile act as shelter for an assortment of animals native to the southern U.S. They are listed as federally threatened and also as vulnerable by the IUCN, but collisions with vehicles are a leading cause of death for the gopher tortoise, which often must cross roadways in order to forage, find a mate, or dig a new burrow. To see a shot of this species in the Photo Ark follow me, @joelsartore. #tortoise #gophertortoise #highway #photoark」5月28日 18時38分