European starling, common European rat. Brown tree Snake. Round Gobi, Brushtail Opposum, Common housecat, eurasian boar (domestic pig) and my personal favorite: the grey squirrel (exterminating fox squirrels in a neighborhood near you!)
Sorry, took a class on this, the prof was vehemently angry about it. Made us memorize lists of what he called "bad".
That doesn't mean that any of these (or the rest) are actually worse than the zebra mussel, i wouldn't know. Just impulse to spout them off after that grueling experience.
Last edited by skinnybass; 03/23/10 12:58 PM. Reason: had to blame the teacher.
