As rabbits go, “cute and cuddly” is often the standard. But there is one rabbit that is considered to be “scientifically cute” — the smallest rabbit in the world, the pygmy rabbit.

DENVER— Conservation groups today sent a formal notice of their intent to sue the U.S. Fish and Wildlife Service for failing to take steps to protect the pygmy rabbit, the world’s smallest rabbit, ...

Conservation groups Wednesday sent a formal notice of their intent to sue the U.S. Fish and Wildlife Service for failing to ...