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Celebrating 100 Years of Science! | 1925-2025
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Front view, whole bush with clusters of red berries
Lonicera maackii (Amur honeysuckle)
Burmese python
Python bivittatus (Burmese python)
Giant salvinia is an aquatic fern, native to south-eastern Brazil. It is a free floating plant that remains buoyant on the surface of a body of water, and is known for its capability to take over large bodies of slow-moving fresh water. The rapid growth rate of Giant Salvinia has resulted in its classification as an invasive weed in some parts of the world such as Australia, United Kingdom, New Zealand, and parts of America.
Salvinia molesta (Giant Salvinia)
Hymenachne was introduced into northern Queensland, Australia in the 1970s to use in ponded pastures. It escaped cultivation a few years after its release in 1988. It is spreading throughout the tropical wetlands of northern Australia and is most common in the coastal wetlands of northern Queensland and the Northern Territory.
Hymenachne amplexicaulis (Olive hymenachne)
This nematode worm is a parasite, originally from Southeast Asia. With the American eel population already declining, the introduction of this nematode may have a large negative impact on the survival of this species.
Anguillicoloides crassus (Nematode Worm)
Pickleweed is an invasive or introduced plant in Hawaii. It has succulent, brilliant green leaves and is common in salt marshes and tidal shorelines. It grows slowly in soils with high salt concentrations and areas with seawater overwash where it suffers little competition from other plants. The species manages salts by sequestering them in cell vacuoles and eventually shedding the leaves.
Batis maritima (Pickleweed)
Native to India, introduced to Hawaii Island in 1883 (via Jamaica, where it was also introduced), then introduced to Maui, Molokai, and Oahu; none were introduced on the island of Kauai. Mongoose were imported by the sugar industry to control rats in cane fields. This infamous mistake was made without much knowledge about mongoose. Mongoose, which are active during the day, did not control the rats because the rats are primarily active at night.
Herpestes javanicus (Small Asian Mongoose)
Invasive multiflora with Russian olive (Elaeagnus angustifolia) among planted Red Cedars (Juniperus virginiana), in Maryland.
Invasive multiflora with Russian olive (Elaeagnus…
Invasive multiflora with wild grape (Vitis spp.) among planted Red Cedars (Juniperus virginiana), in Maryland.
Invasive multiflora with wild grape (Vitis spp.)
Invasive Russian olive (Elaeagnus angustifolia) in Maryland.
Invasive Russian olive (Elaeagnus angustifolia)
The poison ivy (Toxicodendron radicans) vines climbing trees on this property on the Eastern Shore of Maryland have been cut and are allowed to die in place, preventing bark damage with attempted removal.
Poison ivy (Toxicodendron radicans)
Eastern Hemlock trees (Tsuga canadensis) killed by the hemlock woolly adelgid (Adelges tsugae), an invasive sap sucking insect from Asia, in Shenandoah National Park, Virginia.
Dead Eastern Hemlock trees in Shenandoah National…
Eastern Hemlock trees (Tsuga canadensis) killed by the hemlock woolly adelgid (Adelges tsugae), an invasive sap sucking insect from Asia, in Shenandoah National Park, Virginia.
Dead Eastern Hemlock trees in Shenandoah National…
Eastern Hemlock trees (Tsuga canadensis) killed by the hemlock woolly adelgid (Adelges tsugae), an invasive sap sucking insect from Asia, in Shenandoah National Park, Virginia.
Dead Eastern Hemlock trees in Shenandoah National…
Hemlock woolly adelgid (Adelges tsugae), an invasive sap sucking insect from Asia, eating sap from eastern hemlock trees in Shenandoah National Park, Virginia.
Hemlock woolly adelgid (Adelges tsugae)
Hemlock woolly adelgid (Adelges tsugae), an invasive sap sucking insect from Asia, eating sap from eastern hemlock trees in Shenandoah National Park, Virginia.
Hemlock woolly adelgid (Adelges tsugae)
Illustration of Acridotheres tristis (Common Myna), which is an invasive pest in South Africa, North America, the Middle East, Australia, New Zealand and many Pacific islands as it out-competes native hollow-nesting bird species.
Acridotheres tristis (Common Myna)
Illustration of Merremia peltata, a common invasive on Pacific Island nations.
Merremia peltata
Illustration of Spathodea campanulata (African Tulip), a common invasive species in many tropical areas, including Samoa and Fiji.
Spathodea campanulata (African Tulip)
Merremia peltata, an invasive vine, climbs a coconut palm and the neighbouring forest in Samoa. Photo taken on the northwest coastal road of Upolu, Samoa.
Merremia smothering a coconut palm
Illustration of Japanese stiltgrass
Microstegium vimineum 2 (Japanese Stiltgrass)
Rocky Mountain invasive flower in bloom
Common mullein (Verbascum thapsus)
Salmon-Challis National Forest, Idaho
Invasive sign at trailhead
Illustration of Dactylis glomerata (Orchard Grass)
Dactylis glomerata (Orchard Grass)
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