animal creep garden herbivore invertebrate Mollusca shell Slime snail spiral stalks arthropod caterpillar grass insect organism plant pollinator terrestrial animal Terrestrial plant blue butterfly Lepidoptera Morpho natural nature pattern rhoplaocera vein wing anemone aquarium life marine orange sea tentacles tropical underwater water diptera feed flower fly hoverfly marjoram rest summer Arachnidae cross eight England leg predator silk spider Sussex underside web Balanus barnacle boulder cluster crowd crustacea Gower group pool rock sessile wales algae aquatic coastal rock-pool seaweed welsh bush bush-cricket cricket grasshopper green hop ice-plant jump katydid orthoptera pink Sedum copulation couple dragonflies dragonfly eye gauzy hang mate mating Odonata pair suspend two