In addition, yellowjackets have been major cause in demise of native invertebrates at higher elevations. Euglandina SnailS Demise of endemic land snail genus Achatinella largely due to introduction of predatoryEuglandina rosea. None native to Hawaii, but 14 alien species established. Replace native plants - almost nothing can grow beneath shade. Also reduces sunlight to canopy trees.
Pigs also help it by digging up ferns, thus opening up areas to sun-loving banana poka.