Delta Invasive Species
Invasive Animal Species in the Delta
Click the caption of each photo for more information about the species.
Chinese mitten crab – Eriocheir sinensi (Photo by CDFW) New Zealand mudsnails – Potamopyrgus antipodarum (Photo by U.S. Geological Survey) Northern watersnake – Nerodia sipedon (Photo by Patrick Coin) Nutria – Myocastor coypus (Photo by CDFW) Quagga Mussels – Dreissena rostriformis bugensis (Photo by CDFW) Southern watersnake – Nerodia fasciata (Photo by CDFW) Zebra mussel – Dreissena polymorpha
Invasive Plant Species in the Delta
Click the caption of each photo for more information about the species.
Alligatorweed – Alternathera philoxeroides (Photo by National Plant Data Center, Baton Rouge, LA) Brazilian egeria – Egeria densa (Photo by Lara Gudmundsdottir) Common reed – Phragmites australis subsp. australis (Photo by Erlend Bjortvedt) Curlyleaf pondweed – Potamogeton crispis (Photo by Christian Fischer) Eurasian watermilfoil – Myriophyllum spicatum (Photo by Fungus Guy) Giant reed – Arundo donax Perennial pepperweed – Lepidium latifolium (Photo by Leslie J. Mehrhoff, University of Connecticut, Bugwood.org) Purple loosestrife – Lythrum salicaria (Photo by Liz West) South American spongeplant –Limnobium laevigatum (Photo by Cardex) Water hyacinth – Eichhornia crassipes (Photo by Wouter Hagens) Water primrose – Ludwigia spp. (Photo by Bouba)