Due to the effects of global warming, tens of thousands of walruses have come ashore in Alaska.
The ice they usually rest on has melted. Walruses can be seen "for one mile or more. This is just packed shoulder-to-shoulder," sajd U.S. Geological Survey biologist Anthony Fischbach.
Although there may be enough food for all of them, scientists are concerned about the one-ton females stampeding each other and their smaller calves.
"When they no longer have a place to rest, they need to go some place and it's a long commute," said Fischbach. "This is directly related to the lack of sea ice.
The federal government is determining whether walruses should be put on the endangered species list.
[Image via AP Images.]