Why do giraffes have blue tongues?

Answer

Melanin, which creates dark pigmentation in skin, is responsible for giraffe tongues' dark color. Although it is unknown exactly why giraffes have tongues that appear blue, purple and sometimes almost black, scientists believe that the animals' tongues have evolved this way for sun protection.

Giraffes have prehensile tongues that wrap around leaves and can grow to be up to 20 inches in length. When feeding, the animals' tongues are frequently out of their mouths and exposed to sunlight, so the dark coloration serves to prevent them from getting sunburned. The underside of giraffes' tongues is a light pink color because it does not get as much sun and therefore needs less protection.

Q&A Related to "Why do giraffes have blue tongues?"
The spots of a giraffe help to camouflage the giraffe among the trees. There are different subspecies of giraffe and, interestingly enough, they each have a different coat pattern
http://www.ask.com/web-answers/Science/Biology/why...
They have to have flexible tongues to reach the leaves on top of a tall tree. And also to pick their boogers too. Gross rite? i hope this helps.
http://wiki.answers.com/Q/Why_do_giraffes_have_fle...
A giraffe's tongue is 50cm long & is dark grey/blue/black. One theory as to why a giraffe's tongue is this colour is to prevent it from being sunburned.
http://www.kgbanswers.co.uk/why-is-a-giraffes-tong...
Frogs with long tongues eat prey that is far away. Frogs (such as Ground Frogs) that eat prey close to them (such as ants) don't have long tongues. so they can catch tings from further
http://wiki.answers.com/Q/Why_do_frogs_have_long_t...
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The length of a giraffe's tongue is between 45 to 50 centimetres. The tongue is coloured black, blue or purple, or shades of the three. It is opined that this ...
Giraffes do have long blue-black tongues that are about 45 to 50 metres. The tongue is used for feeding and it normally wraps around the leaves and picks them ...
The giraffe has a dark blue to black colored tongue. Their tongue can also be as long as 20 inches. Giraffes are the tallest and has the longest tails of all ...
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