The smallest owl is the elf owl, which is only six inches tall and weighs 1.5 ounces. It looks like a sparrow and lives in the south-western United States and Mexico. The largest owl is Blakiston`s fish owl, weighing 6 to 8.8 pounds with a wingspan of 6.5 feet.

It can be found in Russia, China, and Hokkaido, Japan, and it eats fish, as its name suggests.