Nature Reshuffled. American bullfrog : Lithobates catesbeianus ; Brown tree snake : Boiga irregularis ; Chytrid fungus : Batrachochytrium dendrobatidis ; Humboldt squid : Dosidicus gigas ; European green crab : Carcinus maenas.
Equilibrium Lost. Eastern gray squirrel : Sciurus carolinensis ; Killer algae : Caulerpa taxifolia ; Feral pig : Sus scrofa ; Giant African land snail : Achatina fulica ; C. Difficile : Clostridium difficile.
Arrival of the Fittest. Argentine ant : Linepithema humile ; Crown-of-thorns starfish : Acanthaster planci ; Nutria : Myocastor coypus ; Hydrozoan : Turritopsis dohrnii ; Kudzu : Pueraria montana.
The World of the Future. Zebra mussel : Dreissena polymorpha ; Jellyfish : Phylum Cnidaria and Phylum Ctenophora ; House sparrow : Passer domesticus ; Water hyacinth : Eichhornia crassipes ; Nile perch : Lates niloticus.
