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spec: He has always been interested in the materials and technology of Northwest Coast Native cultures , making nearly every kind of object , from full size plank houses , canoes , and totem poles to bead - and porcupine quill decorated clothing of the Plains and Plateau . Some species are restricted to a particular herbivore ; for example , Lasiobolus cainii is found only on porcupine dung . Conventional aluminium structure augmented by graphite ailerons , spoilers , elevators , rudder and floor panels ; advanced aluminium alloy keel beam chords and wing skins ; composites engine cowlings , wing / fuselage fairing and rear wing panels ; CFRP landing gear doors ; and aramid flaps and engine pylon fairings . If you are in an emissions testing area , you are required to have your vehicle tested in that area . The summer growing season currently requires a rigorous pest management program for aphids , spider mites , lygus bugs , leafminers , and occasional pod boring caterpillars . Why does the porcupine fish puff itself up ? When I got an elephant , a smaller animal than a porcupine , I gave my friend an equal share while he gave me only a small amount of the porcupine meat . He had , he explained , " about the same desire to annex it as a gorged boa constrictor might have to swallow a porcupine wrong-end-to . Uneaten prey items should be removed within an hour after introduction , or sooner if the spider actively avoids its intended prey .