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The animal on the cover of Programming Web Services with Perl is a flying dragon (genus draco). Found in the tropical rainforests of the East Indies and Southern Asia, this small lizard has five or six hind ribs on each side that are prolonged and covered with weblike skin, forming "wings." While jumping, the lizard spreads its wings and glides to the ground; it can generally glide almost nine yards. Gliding is used only as a means of locomotion and not for predator escape; to escape danger, the lizard always climbs. The lizard also never glides when it's raining or windy.