Amur honeysuckleLonicera maackii

© Troy Evans, Bugwood.org

bighead carpHypophthalmichtyhs nobilis

Photo © David Riecks, University of Illinois

Brazilian elodeaEgeria densa Planch

© William T. Haller, University of Florida, Bugwood.org

common reed (phragmities)Phragmites australis

Left Photo © Leslie J. Mehrhoff, University of Connecticut, Bugwood.orgRight photo ©Jil M. Swearingen, United States Department of the Interior National Park Service, Bugwood.org

curlyleaf pondweedPotamogeton crispus

© Chris Evans, River to River Colorado Weed Management Association, Bugwood.org

cutleaf teaselDipsacus laciniatus L.

Photo © Todd Pfeiffer, Klamath County Weed Control, Bugwood.org

D-shaped hole made by emerald ash borer

© Kelly Estes, Illinois Cooperative Agricultural Pest Survey

emerald ash borerAgrilus planipennis

© Kristen Dyson, Illinois Department of Natural Resources

Emerald ash borer larva(Agrilus planipennis)

© Marion Shier

emerald ash borer serpentine galleries

Photo © Kelly Estes, Illinois Cooperative Agricultural Pest Survey

Eurasian watermilfoilMyriophyllum spicatum

Photo © Alison Fox, University of Florida, Bugwood.org

European starlingSturnus vulgaris

Photo © David W. Brewer, DWBrewer Imaging

fishhook waterflea and water fleaCercopagis pengoi Bythotrephes cederestroemi

Photo © 2001, J. Liebig, NOAA, Great Lakes Environmental Research Laboratory

garlic mustardAlliaria petiolata

© Chris Evans, River to River CWMA, Bugwood.org

house sparrow (female)Passer domesticus

© Mark Jankura

house sparrow (male)Passer domesticus

© Mark Jankura

Japanese honeysuckleLonicera japonica

© Chris Evans, River to River CWMA, Bugwood.org © Chuck Bargeron, University of Georgia, Bugwood.org

musk thistleCarduus nutans

© James H. Miller, USDA Forest Service, Bugwood.org © Ricky Layson, Ricky Layson Photography, Bugwood.org

Norway mapleAcer platanoides

© Jan Samanek, State Phytosanitary Administration, Bugwood.org

Oriental bittersweetCelastrus orbiculatus

© James H. Miller, USDA Forest Service, Bugwood.org

purple loosestrifeLythrum salicaria

© John D. Byrd, Mississippi State University, Bugwood.org

quagga mussels (top row) and zebra mussels (bottom row)

Dreissena rostriformis bugensis Dreissena polymorpha

© NOAA, Great Lakes Environmental Research Laboratory

round gobyNeogobius melanostomus

© Eric Engbretson, Engbretson Underwater Photography

ruffeGymnocephalus cernuus

provided by zhaubasar/pond5.com

Russian oliveElaeagnus angustifolia

© Paul Wray, Iowa State University, Bugwood.org

rusty crayfishOrconectes rusticus

© Eric Engbretson, Engbretson Underwater Photography

salt cedarTamarix spp.

© Tom Heutte, USDA Forest Service, Bugwood.org

sea lampreyPetromyzon marinus

Photos courtesy Great Lakes Fishery Commission

silver carpHypophthalmichthys molitrix

© Francis. M. Veraldi, USACE

tree of HeavenAilanthus altissima

© Chris Evans, River to River CWMA, Bugwood.org

water fleaBythotrephes cederestroemi

© NOAA, Great Lakes Environmental Research Laboratory

winter creeperEuonymus fortunei

© Chris Evans, River to River CWMA, Bugwood.org © James H. Miller, USDA Forest Service, Bugwood.org

zebra musselsDreissena polymorpha

© NOAA, Great Lakes Environmental Research Laboratory