The scene was relayed by a live webcam of bears on Alaska's Brooks River. “This is very difficult to watch and comprehend,” said Naomi Boak of the nonprofit Katmai Conservancy.

Fat Bear Week, a celebration of brown bears’ survival instincts, brought a grisly reminder of the animals’ predatory nature on Monday, when a male bear, 469, killed a female, 402, at Katmai National Park & Preserve in Alaska.

The unsettling scene was captured by a popular live webcam that follows the bears on the Brooks River.

In a statement sent to NPR, the park said, “National parks like Katmai protect not only the wonders of nature, but also the harsh realities. Each bear seen on the webcams is competing with others to survive.”