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BBC America: The longer days trigger dramatic events across the natural world. In March, a wave of blooming Cherry Blossoms unfolds across Japan signalling the arrival of Spring. The season for new life spurs many creatures to find a mate.

BBC America: Summertime triggers some of the planet's great seasonal migration events: including thousands of Sock Eye Salmon reach the end of their journey to spawn in rivers attracting Brown Bears in a feeding frenzy.