Look at the rabbit and ask yourself the same question -.-'
their ears their ears their ears
Animals may have smaller ears because they live in cold environments and heat is lost through your ears
polar bears aren't small you imbecile
Gerbils are desert burrowing animals, so I would think (I am not a biologist) that they have small ears to help reduce sand getting in their ears. They originated in Mongolia, which is between China and Russia (the old Soviet Union for those of us who are older), so it is colder there, so smaller ears would reduce heat loss as well. They are desert animals, but not all deserts are cold. :)
Polar bears have small ears so they do not lose much heat from their bodies. Like your head and feet, heat can be lost through our ears. Their smaller ears help them keep all the heat they can get in their chilly arctic environments.
animals can have holes for ears or can use smell if they don't have ears
A rabbit with small ears has small ears and a rabbit with big ears has big ears.
A small horse with big ears is often referred to as a "donkey." Donkeys are known for their large ears, sturdy build, and are commonly used as pack animals. They are distinct from horses but belong to the same family, Equidae.
There are not any animals that have more than two ears. The ears of animals help them to hear things, especially predators.
Compared to most other animals, rabbits have big ears.
They are adaptations to aid the animal in it's everyday life. African elephant ears are no more efficiant for hearing than Indian elephant's ears but they are much larger in external area. This is so that large blood vessels can circulate great quantities of blood through the ear flaps quickly to aid in cooling the blood and therefore the body. Aquatic animals, water-dogs, beaver etc have different ears best adapted for their environment. Other animals have ears that rotate to give them 360 degree hearing.
Animals use their ears to hear sounds in their environment, communicate with each other, and detect potential dangers. Ears also help animals maintain balance and orient themselves. Some animals, like bats, use their ears for echolocation to navigate and find prey.