For 10 points, name this egg laying mammal, part of whose name is derived from the mallard-like appendage on its nose.
This organism is one of the only in its class to have a sense of electroreception, and it spends more time in REM stage sleep than any other mammal. The males of this animal use their ankle spurs to produce venom, and is one of the only extant monotremes along with the echidna. For 10 points, name this egg laying mammal, part of whose name is derived from the mallard-like appendage on its nose.
This organism is one of the only in its class to have a sense of electroreception, and it spends more time in REM stage sleep than any other mammal.
duck-billed {platypus} (accept {echidna} before "{REM}")