MIMICRY? NO, I’M IN A BAD MOOD

Yemen or Veiled Chameleon (Chamaeleo calyptratus, Duméril and Bibron 1851) Some species of chameleons, but not all, can change the colour of their skin. The principal reason to the change of tone is not the camouflage (mimicry) but the manifestation of certain physical or physiological, or emotional states such as…

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WHO SAW IT?

Snow Leopard (Panthera uncia o Uncia uncia, Schreber 1775) Few animals are more mysterious and unapproachable of Snow Leopard. Only someone saw one in the wild and very little is known of how he lives. Endemic to the high mountains of Tibet, Snow Leopard has a thick greyish coat, slightly tinted…

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BORN TO BE SURVEYORS!

The Geometridae, from Latin geometres that means surveyors, (Geometridae, Leach, 1815) are a family of Lepidoptera (butterflies), which includes about 21,000 species. Most have cryptic drawing and coloring, suitable for camouflage in the environment, but some, such as those of the genus Abraxas, have vibrant aposematic colors, to warn predators to…

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WHAT’S THE COLOUR OF WHITE BEAR?

The Polar Bear or White Bear (Ursus maritimus, Phipps 1774), large carnivorous mammal belonging to the family Ursidae, definitely looks white, but as the old saying goes, looks can be deceiving. The outer hairs of the bear are actually transparent, and its undercoat is really colourless. So why do Polar…

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PENNE O PIUME ?

Ciò che contraddistingue gli uccelli dagli altri animali è il piumaggio. Le funzione del piumaggio sono molteplici: esso serve come strato protettivo contro la dispersione del calore (la temperatura corporea di un uccello è di circa 41 gradi!); come imbottitura contro gli urti (la pelle degli uccelli è estremamente sottile);…

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