One airport, 1,300 snakes: San Francisco helps to save endangered species

A parcel of land owned by the international airport is home to the largest population of the San Francisco garter snake

Across from the San Francisco international airport, and past the bustling highway that hugs it, lies what appears to be an empty lot. But the 180-acre, airport-owned parcel of land, which sits beyond the tarmac, tucked against residential homes, isn't quite empty. It's home to roughly 1,300 snakes.

With brightly painted bands of blue, orange-red and black that line their slender bodies, the garter snakes, which can grow up to 3ft long, are considered among the most beautiful in the world. They are also among the most threatened.