Ladybug Beetle
Roger Hall
Northern Snakehead
USGS and USFWS/ Science Source
Emerald Ash Borer
Science Source
Starling Feathers
William H. Mullins
Honey Locust Thorns
Dr. Hinrich Bäsemann
Ladybug Drinking
Scott Linstead
Purple Loosestrife
Ted Kinsman
Orange Sheath Tunicate #1
Andrew J. Martinez
Invasive Tunicate #1
Andrew J. Martinez
Star Tunicate
Andrew J. Martinez
Brown Marmorated Stinkbug
John Kaprielian
Invasive Tunicate
Andrew J. Martinez
Star Tunicate #2
Andrew J. Martinez
Nutria Teeth
Gary Retherford
Night Crawler
Paul Whitten
Asian Long-horned Beetle #1
Ted Kinsman
Zebra Mussel #8
Ted Kinsman
Capybara and Jacana
Francois Gohier
Purple Loosestrife
John Kaprielian
Quagga Mussels Dreissena Bugensis #6
U.S. Fish & Wildlife Service
Wild Boars
Gregory G. Dimijian, M.D.
Asian Long-horned Beetle Damage
Ted Kinsman
Quagga Mussels Dreissena Bugensis #1
US Fish and Wildlife Service
Gypsy Moth Caterpillar Spins Cocoon
Robert Noonan
Male And Female Gypsy Moths
Robert Noonan
Gypsy Moth Caterpillar
Robert Noonan
Gypsy Moth Damaged Forest
Robert Noonan
Quagga Mussels Dreissena Bugensis #2
US Fish and Wildlife Service
Quagga Mussels Dreissena Bugensis #7
U.S. Fish & Wildlife Service
Quagga Mussels Dreissena Bugensis #9
U.S. Fish & Wildlife Service
Ladybug Beetle #1
Roger Hall
Gypsy Moth Caterpillar #3
Robert Noonan
Gypsy Moth Lays Eggs
Robert Noonan
Gypsy Moth Lays Eggs #1
Robert Noonan
Ir Image Of Moth-damaged Forest
Robert Noonan
Oriental Bittersweet
John W. Bova
Asian Long-horned Beetle
Ted Kinsman
Yellow Star-thistle
William H Mullins
Yellow Star-thistle #2
William H Mullins
Asian Longhorned Beetle
Barbara Strnadova
Asian Longhorn Beetle
Barbara Strnadova
Quagga Mussel Dreissena Bugensis
US Fish and Wildlife Service
Brazil Pepper In Florida
John Kaprielian
Quagga Mussels Dreissena Bugensis #3
U.S. Fish & Wildlife Service
Quagga Mussels Dreissena Bugensis
US Fish and Wildlife Service
Quagga Mussels Dreissena Bugensis #5
U.S. Fish & Wildlife Service
Quagga Mussels Dreissena Bugensis #8
U.S. Fish & Wildlife Service
Brown Tree Snake Boiga Irregularis
John Mitchell
Gypsy Moth Caterpillars
Robert Noonan
Gypsy Moth Eggs And Wasp
Robert Noonan
Gypsy Moth Caterpillar Spins Cocoon #1
Robert Noonan
Gypsy Moth Caterpillars #2
Robert Noonan
Gypsy Moth Caterpillar Spins Cocoon #2
Robert Noonan
Parasitic Wasp Attacks Gypsy Moth Eggs
Robert Noonan
Hatching Gypsy Moths #2
Robert Noonan
Gypsy Moth Caterpillar Spins Cocoon #3
Robert Noonan
Oriental Bittersweet #1
John W. Bova
Quagga Mussels Dreissena Bugensis #1
U.S. Fish & Wildlife Service
Asian Carp Species
USFWS/Science Source
Quagga Mussel Dreissena Bugensis #1
U.S. Fish & Wildlife Service
Water Hyacinths
Richard Hansen
Hatching Gypsy Moths
Robert Noonan
Hatching Gypsy Moths #1
Robert Noonan
Male & Female Gypsy Moths
Robert Noonan
Porcelainberry
John W. Bova
Gypsy Moth Caterpillar #1
Robert Noonan
Gypsy Moth Pupa
Robert Noonan
Parasitized Ash Borer Larva
Science Source
Aztecs Dying Of Smallpox
Science Source
Zebra Mussels Dreissena Polymorpha
Ted Kinsman