2 of 2 results for "autumn migration"
Student Article
Millions of Insects Squeeze Through a Narrow Mountain Pass in the Pyrenees Each Year!
The article "Millions of Insects Squeeze Through a Narrow Mountain Pass in the Pyrenees Each Year!" from BBC's Discover Wildlife reveals how over 17 million insects migrate through a narrow mountain pass in the Pyrenees each autumn.
Video
The Epic Battle Between Salmon and Bears

In The Epic Battle Between Salmon and Bears, narrator Andrew Scott describes how, as autumn arrives in southern Alaska, the landscape transforms along with the weather! Chilly temperatures and storms bring heavy rain, flooding the rivers just in time for one of nature’s greatest events. Millions of Pacific salmon make their epic journey upstream, leaping over waterfalls while hungry grizzly bears wait for their biggest feast of the year. The bears battle for the best spots, catching up to 30 salmon a day to pack on weight for the winter ahead — but for the salmon, it’s a life-or-death challenge to make it home. This video is excerpted from BBC’s Earth’s Great Seasons, which reveals how seasonal changes shape the planet and its wildlife.