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Toco Toucan
Toco toucan in a tree
Image captured by Joanne Hedger / Getty Images
We could never leave the toco toucan off this list. Its amazing bill accounts for between 30% and 50% of its entire body surface area. Good for reaching things that would otherwise be too far away, the toucan's bill may also be good for peeling skin from fruit, intimidating other birds, and scaring off predators. However, scaring them is all it could really do. The bill is made of a honeycomb of keratin, so it is not particularly heavy nor strong. But that structure also helps it regulate body temperature. Research has suggested that by adjusting blood flow to the bill, toucans can relea