The blue whale possesses the largest tongue of any animal. The tongue of an average-size adult blue whale weighs 3 tons. When the size of a tongue is considered in relation to body size, the chameleon comes in first place.
In most cases, the tongue of an adult chameleon is as long as the animal's body and tail combined. The mammal with the longest tongue relative to body length is a type bat discovered for the first time in 2005. The bat sucks nectar from a specific type of flower found in Ecuador and is thought to be the only mammal involved in plant pollination.