Southern right whales grow about 25 times bigger and 60,000 times heavier than an average kelp gull. Even newborn whales dwarf adult gulls by a factor of seven.

 

But that doesn't stop the gulls from hunting right whales off the coast of Argentina. And although these unlikely attacks have been going on for years, the problem seems to be getting worse: Whales near Valdes Peninsula have been dying in droves lately, with gulls as a leading suspect. Last year's death toll of 116 whales marks a 100 percent jump from 2011, according to the AFP, and 88 percent of the 605 whales killed since 2003 were calves. It remains unclear if birds are killing all these whales, but scientists have noticed the giant mammals changing their natural behavior to avoid the onslaught.