Australian breeding burrows control damage damaging danger destructive devastating digging ecosystem environmental erosion fauna feral invasive mammal mammalian pest pest pest control populated prolific rabbits reproductive spread threat uncontrollable widespread wild wildlife blue Cockatoos corellas demonstrative docile flock garden pest grazing Noisy pet root eater show-off talker vocal white yellow tail feathers beaks birds branches eucalyptus-tree gum-tree native tree Blister beetle flower eating insect Lytta aenea macro.animal nature outside spider summer web garden gardening mollusc mollusk shell snail snails colour cricket grasshopper green animal animals dead death fur rat rats rodents bug Cockroach dinosaur disease monster scary scavenger chimney city gull isolated roof rooftop seagull town urban