There are 15 Humboldt penguins at the Zoo: 8 males, 7 females and one chick of unknown sex.
Loverboy: Male, arrived from Sea World on October 14, 1993. He has a pink band on his right flipper.
Lemonhead: Female, hatched on December 22, 1990 and arrived from Sea World on October 14, 1993. She has a yellow band on her left flipper.
Rocko: Male, arrived from Sea World on October 14, 1993. He has a green band on his right flipper.
Winkie: Female, hatched at the Philadelphia Zoo on May 12, 1996. She does not have a band on either of her flippers.
Mutato: Female, hatched at the Philadelphia Zoo on March 12, 1997. She has a green-pink-green band on her left flipper.
Emperor: Male, hatched at the Philadelphia Zoo on April 6, 2000. He has a blue-pink band on this right flipper.
Otis: Male, hatched at the Philadelphia Zoo on May 28, 2001. He has a blue-white band on his right flipper.
Little Bird Junior (LBJ): Female, hatched at the Philadelphia Zoo on May 31, 2001. She has a yellow-white band on her left flipper.
Calfred: Female, hatched at the Philadelphia Zoo on April 18, 2002. She has a yellow-pink band on her left flipper.
Shawn: Male, arrived from Denver Zoo on October 11, 2007. He has a yellow band with blue beads on his right flipper.
Shamrock: Male, hatched at the Philadelphia Zoo on March 17, 2009. He has a green-white-green band on his right flipper.
Jamaican Me Crazy: Male, hatched at the Philadelphia Zoo on April 9, 2009. He has a yellow-green-orange band on his right flipper.
Tequila: Female, hatched at the Philadelphia Zoo on January 11, 2010. She has a yellow-green band on her left flipper.
Margherita: Female, hatched at the Philadelphia Zoo on January 26, 2011.
And one unnamed penguin. Female, hatched at the Philadelphia Zoo on April 13, 2000. She has a pink band on her left flipper.