 They have elongated and slender snouts that function as both mouth and nose.Like the platypus, they are equipped with electrosensors, but while the platypus has 40,000 electroreceptors on its bill, the long-beaked echidna has only 2,000 electroreceptors, and the short-beaked echidna, which lives in a drier environment, has no more than 400 located at the tip of its snout.They have very short, strong limbs with large claws, and are powerful diggers.