Am I a penguin or a policeman? 

Biologist Anastasia Koroleva, who studies marine mammals in Antarctica at Russia's Bellingshausen Station, posted a trending video featuring funny penguins. But she's studied them before, not just for the funny footage. 

It turns out that several species of penguins are found on King George Island. One is the chinstrap penguin, or chinstrap penguin—easily recognized by the thin black stripe under its chin. Polar explorers, however, call it the "policeman."  

There's also the gentoo penguin, or gentoo, with a bright orange beak and black eyebrows behind its eyes. Anastasia often encountered it on icebergs, where penguins rest. 

The third species is the Adelie penguin, which has a completely black head and a white belly. 

"They're the smallest and cutest of the local penguins. Like all penguins, they're rather clumsy on the shore. For example, here, Adélie was in a hurry but got distracted by a rock. It happens to everyone!" Anastasia comments on the video. 

The fourth species she managed to photograph in Antarctica was the king penguin. It visited the polar explorers and scientists on the station's birthday. 

Video: Instagram @__nkoroleva