A silent, yet sinister, penguin who is a notorious criminal mastermind and bird of many faces - long thought to be a chicken, Feathers McGraw was actually exposed as a penguin, when his plan to rob a museum of precious diamonds was foiled by Wallace and Gromit. He disguises himself as a chicken by wearing a red rubber glove on his head.
A penguin who strangely enough lives in the Arctic and is close with Lars and co. He leads a troop of lemmings in every appearance. In "The Mysterious Island" the villainous polar bear Brutus, who was sick of Caruso's ever constant singing, dancing and cheerfulness, decides to get rid him by trapping him in a train (along with Lars and Robbie who attempt to prevent this). In the Galapagos he falls in love with a female Galapagos penguin and in the end decides to stay in the Galapagos with his love. His origins are revealed in "A Visitor from the South Pole" where he was found lost at sea by Orca who gladly brought him. He becomes liked by many except for Brutus who again tries to get rid of him (but fails this time).
Iceburgh is the official mascot of the Pittsburgh Penguins. He debuted for the 1991–92 NHL season. Iceburgh was known as "Icey" in the 1995 film Sudden Death starring Jean-Claude Van Damme, filmed at the Pittsburgh Civic Arena. In the movie, the Iceburgh costume was worn by Faith Minton. The name is a play on the words "iceberg" and "Pittsburgh". He usually wears a Penguins jersey with the number "00". The costume is almost identical to that of the Wilkes-Barre/Scranton Penguins' team mascot, "Tux." The only difference is that Iceburgh has an orange neck, and Tux's neck is red. Tux also wears red gloves and Iceburgh wears black. Tux wears the number "99" on his back with the Wilkes-Barre/Scranton Penguins logo on the front of his jersey.
He is the mascot of the Linux kernel and appears in many other Linux programs, usually in different styles. He has also appeared in his own video games, such as Tux Racer, Extreme Tux Racer, Tux Math Scrabble, TuxWordSmith, Tux Math, SuperTux, SuperTuxKart, and Tux Paint. Tux has also appeared in other video games, including OpenArena, Pingus, FreedroidRPG, Team Fortress 2, FreeCiv and many others. In some games, he has a female counterpart named Penny or Gown. Other female counterparts of Tux include Trixi (Tux 2) and Tuxette, which is the female leader name of the Antarctic civilization in FreeCiv (the male leader name being Tux). Tux also had appearances in other media too, such as appearing in a Froot Loops commercial as a squeaky toy, having an uncredited use in a YouTube video by Toutsmith called "Al Gore's Penguin Army", and appearing in various merchandise, such as having his own October Toys Gwin toy and appearing on a WMF "Sealion" fork.
A hypothetical penguin used to teach mathematical induction. To show that the penguin can climb arbitrarily high on a ladder, it is sufficient to show that 1) it can climb to the first rung, and 2) if it can climb to the k rung, then it can climb to the k+1 rung.