Question

Why are humming birds not found in the Polar region?

Answer 1

Hummingbirds and other tiny animals are uncommon in polar regions due to the high energy costs associated with thermoregulation. The relationship between heat input and loss and surface area changes. Because of their increased surface area compared to volume, tiny animals lose body heat more quickly in cold weather. After that, they must use a lot of energy to produce body heat through metabolism.