Aussie Anomaly

What's a mammal, and yet can lay eggs like a bird?
             (And don't say that old Easter bunny.)
What's covered with spines where it ought to be furred,
             Has a long tongue, and walks kinda funny?
What survives every Down-Under climatic feature,
             From frigid to blistering hot?
The answer's a small, spiny ant-eating creature;
             It's true—I'm echidna ya not!

                                     —A. nonAprilFool Mouse

                                                                                                  © 2005