Emperor Penguin - eBird

Gentoo Penguin - eBird

King Penguin - eBird

Video - Emperor Penguin - Aptenodytes forsteri - Birds of the World

King Penguin - eBird

King Penguin - eBird

Chinstrap Penguin: Most Up-to-Date Encyclopedia, News & Reviews

Mapping Application for Penguin Populations and Projected Dynamics (MAPPPD) - SciStarter

Adelie Penguin - Pygoscelis adeliae - Birds of the World

Royal Penguin - eBird