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INVASIVE SPECIES - LATEST
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Rusty Crayfish
Orconectes rusticus
The rusty crayfish has a dark brown body, distinguishable by dark, rusty spots on either side of the carapace. Rusty crayfish are opportunistic feeders. They are a very aggressive species that often displace native crayfish
Silver Carp
Hypophthalmichthys molitrix
Silver carp are deep-bodied fish that are laterally compressed. These large fish, which can reach up to 100 lbs., can breed very rapidly.
Water Lettuce
Pistia stratiotes
Water lettuce is an often free-floating aquatic plant. It forms thick mats that block sunlight and slow or prevent the growth of native aquatic plants.
Water Hyacinth
Oshuna crassipes
Water hyacinth is a free-floating, perennial, aquatic plant. In climates where it is unable to survive the winter, water hyacinth will grow as an annual. Its leaves are round, curved, glossy bright green and float above the water’s surface on bulbous stalks.
Reed Canarygrass
Phalaris arundinacea
Reed canarygrass can reach 5 ft. in height. Its leaves are hairless, reaching up to 10” long and 1⁄4" to 1⁄3" wide. This grass has an extensive root system and spreads primarily through rhizomes, but also produces a high number of seeds.
Bush Honeysuckle
Lonicera tartarica, L. morrowii, L. maackii x L. bella
The invasive bush honeysuckles are deciduous shrubs that may grow to be 15 ft. tall. Honeysuckle leaves are opposite, have smooth margins, and can vary in shape, being oval or tapered at the tip.
Bloody Red Shrimp
Hemimysis anomala
The bloody red shrimp are translucent ivory-yellow in color, and exhibit bright red to reddish-orange coloring around the head and tail. The threat to the Great Lakes is currently not well understood.
Lesser Celandine
Ficaria verna
Lesser celandine is a low-growing, herbaceous perennial that has the ability to form extensive mats across the ground. It can be identified by its dark and shiny green, kidney-shaped leaves.