Well, obviously it's white, but take a look at its bill!

The attractive 7.5-inch-long bill is possessed by both male and female toucans. Interestingly, they use them during a mating ritual, pitching fruit to one another, but has very limited use as an excavation tool. Toucans make their nests in tree hollows found in rain forest regions of Southern Mexico, Central and South America, and the Caribbean region to which they are native.

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Opals (shown above) are is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. Opal is the national gemstone of Australia.

The internal structure of precious opal makes it diffract light. Depending on the conditions in which it formed, it can take on many colors. The one pictured on the left is called the "Virgin Rainbow" opal, being the finest ...

This is the sky blue mushroom (Entoloma hochstetteri), a species of mushroom found in New Zealand and India. The small mushroom is a distinctive all-blue colour, while the gills have a slight reddish tint from the spores. The blue colouring of the fruit body is due to three azulene pigments. Entoloma hochstetteri is not edible, but whether or not it is poisonous is unknown. This species was one of six native fungi featured in a set of fungal stamps issued in New Zealand in 2002. It is also seen on the reverse side of the $50 bank note, issued by the Reserve Bank of New Zealand in 1990.

Source: http://oddstuffmagazine.com/13-bizzare-mushrooms-from-around-the-world.html ...

'Fire rainbows', also known as iridescent clouds, are a rare phenomenon that only occur when the Sun is higher than 58° above the horizon and its light passes through cirrus clouds made of ice crystals. At the right alignment, the ice crystals act as a prism, and refract the light to look like a rainbow. ...

This is beautiful but deceptive Clavaria zollingeri, also known as the violet or magenta coral. But contrary to its name, it doesn't live underwater - it's a species of fungus that grows in woodland areas in North America, South America, Africa, Asia, New Zealand and Australia.