It’s summer time and the living is easier for Alaska’s animals.

Spring has turned to summer in Alaska as the documentary series continues this week, and that means the snow and ice has vanished from all but the highest peaks.

With the rivers no longer frozen over, the scene is set for the migration of hundreds of millions of salmon.

That’s extremely welcome news for the brown bears who depend on the fish to help them fatten up before going back into hibernation.

Meanwhile, the Arctic foxes’ ‘dinner’ comes from the sky as sea birds return in their droves, and rufous hummingbirds need to consume their own body weight in nectar every day before they make the 3,000-mile trip to Mexico for their winter holiday.

Another gorgeous episode.