What are the names of the peguins off of madagasgar?

The main penguins from the animated series "The Penguins of Madagascar" are Skipper, Kowalski, Rico, and Private. Skipper is the leader, Kowalski is the brains of the group, Rico is the explosives expert, and Private is the tender-hearted recruit. Together, they embark on various humorous missions and adventures in their quest for fun and to protect their home.