Great horned owls are adaptable birds and live from the Arctic to South America. They are at home ... and use their powerful talons to kill and carry animals several times heavier than themselves.

However, very young falcons may catch flying insects and, occasionally, Arctic peregrines will catch and eat ground-dwelling animals like ... usually winters in South America.

Why do the Galapagos Islands of South America and the Cape Verde Islands off Africa have strikingly different fauna and flora, despite having similar environments? Why does the Arctic have polar ...

The arctic tundra encircles the North Pole, extending from the frozen Arctic in the north to the coniferous forest - also known as the taiga - in the south. Countries across the world such as ...