The edible nest swiftlets of South East Asia make a most unusual nest entirely from their own saliva. The swiftlets build their nests high up on the roofs of a cave. The hard basket shaped cups are made of concentric rings of a protein rich goo secreted during the breeding season by the male’s enlarged salivary glands. Il suo carattere schivo, resta nascosto e vive in disparte, come fosse un eremita. Ma quando si arrabbia sono guai. Il ragno violino,…