World Penguin Day is on April 25.
Wimbledon-based Paul Goldstein snapped the distinctive birds on a recent expedition he led to South Georgia.
He says: "If I could be anywhere for a day, it would be among avian royalty in South Georgia.
"It's one of the reasons I've led countless expeditions to this remote and dramatic outpost in the South Atlantic for twenty years.
"There's nowhere like it: six million extremely accessible charismatic birds, and photography is relatively easy as they can't fly."
The king penguin is the second largest species of penguin, smaller, but somewhat similar in appearance to the emperor penguin.
King penguins form huge colonies when they come in to shore during the mating season. There are estimated to be over 100,000 of them in the South Georgia archipelago.
He says: "If I could be anywhere for a day, it would be among avian royalty in South Georgia.