A skua stands on Deception Island, which is the Caldera of an active volcano in Antarctica, February 17, 2018. Reuters/Alexandre Meneghini 

A seagull perches on a pier as two Falkland Skua birds fly away in Port Stanley, March 14, 2012. REUTERS/Marcos Brindicci (FALKLAND ISLANDS) 

A penguin walks on the runway at the British Rothera research station on the Antarctic Peninsula January 16, 2009. Another type of bird, the south polar skua, is becoming a menace to planes by gathering on the runway, which is warmer than the surrounding snow. REUTERS/Alister Doyle (ANTARCTICA) 

Michael Thomas, a Radio Operator at the Rothera airport on the Antarctic Peninsula, monitors skua birds that have become a threat to planes by developing a liking for sitting on the airstrip in Antarctica January 14, 2009. Bird strikes can down planes. REUTERS/Alister Doyle (ANTARCTICA) 

John Loines, of the British Antarctic Survey, holds up his arm to fend off an attack by a south polar skua as he checks the nest of one of the birds on Lagoon Island, Antarctica January 14, 2009. The birds, the most southerly in the world, are becoming a threat to planes at Antarctic airstrips by developing a liking for sitting on the runways, which are warmer than surrounding snow. REUTERS/Alister Doyle (ANTARCTICA) 

A Skua flies over the Antarctic ocean November 24, 2008. REUTERS/Paulo Whitaker (ANTARCTICA) 

Skua birds take off after swimming in a pool of water near the Norwegian Troll station in Antarctica January 20. Scientists say that pools of water can form naturally in Antarctica even when temperatures are below freezing. To match ANTARCTICA/WITNESS REUTERS/Alister Doyle 

A mother Skua guards her chick on a rocky outcrop among ice at McMurdo Bay, in Antarctica January 28. These scavenger birds live in some of the harshest conditions on earth and have a wingspans of more than three feet. They can even be found hundreds of miles from the coast high up and on the polar ice cap. 

A mother Skua guards her chick on a rocky outcrop among ice at McMurdo Bay, in Antarctica January 28. These scavenger birds live in some of the harshest conditions on earth and have a wingspans of more than three feet. They can even be found hundreds of miles from the coast high up and on the polar ice cap.

AJS/JO//ME