A vast number of Pacific walrus have gathered on shore to rest near Point Lay, Alaska.
The National Oceanic and Atmospheric Administration says an estimated 35,000 walrus were photographed about 700 miles northwest of Anchorage on Saturday.
"The gathering of walrus on shore is a phenomenon that has accompanied the loss of summer sea ice as the climate has warmed," reports Associated Press.
"Unlike seals, walrus cannot swim indefinitely and must rest," reports Alaska's News Miner.
According to charity Defenders of Wildlife, female walrus typically: "leave their young in safety on the sea ice while they forage, then haul out to nurse their calves."
At this time of year, animals in the area are "generally females and juveniles, and the smaller walruses are in danger of being trampled to death in stampedes," reports the Alaska Dispatch News.
"It's another remarkable sign of the dramatic environmental conditions changing as the result of sea ice loss," said World Wildlife Fund Arctic program director Margaret Williams.
"The walruses are telling us what the polar bears have told us and what many indigenous people have told us in the high Arctic, and that is that the Arctic environment is changing extremely rapidly and it is time for the rest of the world to take notice and also to take action to address the root causes of climate change."