This is NOT a hedgehog -- Lesson I

Every few days I will be posting an informative piece I refer to as: "This is NOT a hedgehog...". It is a comparative piece whereby you the reader will gain a far better understanding on what a hedgehog is and is not.
So here goes....are you ready for your first lesson?

This is a hedgehog

This is NOT a hedgehog

This concludes our lesson for today. That is all.