Invasives

Page 5 of 7, Total records 693

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Species Description Photo
Neogobius melanostomus (Round goby) Neogobius melanostomus is a bottom dweller found in rivers and near the shore of lakes, preferring rocky habitats with many places to hide. It preys on small fish, such as darters and the eggs of lake ...
Nephrolepis cordifolia (narrow swordfern) Nephrolepis cordifolia is a plant that grows in many climates, but mainly enjoys subtropical and tropical regions. Nephrolepis cordifolia can be found in gardens and surrounding forests. It spreads ve ...
Neyraudia reynaudiana (Burma reed) Neyraudia reynaudiana presents a threat to ecosystems due to its ability to promote frequent fires and outcompete with native vegetation. Neyraudia reynaudiana thrives from sea level to altitudes of 1 ...
Nicotiana glauca (tree tobacco) Introduced in Hawaii, Ascension, Bermuda, Saint Helena and Canary islands Nicotiana glauca thrives in disturbed habitats as well as sandy beaches and coastal areas. It may pose a threat to pri ...
Anolis garmani (Jamaican anole, Jamaica Giant Anole) The Jamaica giant anole, Anolis garmani is a large arboreal lizard that is used in the pet trade. It is reported to be present in southeastern Florida and is likely to have established on Grand ...
Anolis grahami aquarum (Graham's Anole) The Jamaican anole Norops grahami was introduced to Bermuda from Jamaica in 1905 to reduce populations of the fruit fly (
Anolis lineatus (Striped Anole) Native to Curacao and Aruba in the Netherlands Antilles, Anolis lineatus is not widely distributed in its known introduced range of Suriname. The potential impacts of this species are not well ...
Anolis sagrei greyi (Cuban brown anole, Brown anole) Norops sagrei (brown anole) can be identified by its extensible throat fan that is often coloured yellow or reddish-orange and has a white line down the centre of its back. Norops sagrei is a habitat ...
Nymphaea odorata (American waterlily) Nymphaea odorata is an aquatic plant with floating leaves that can thrive in a variety of aquatic habitats and tolerates variable environmental conditions. It forms dense floating mats of vegetation t ...
Nymphoides peltata (Fringed Water-lily) Nymphoides peltata is usually introduced as an aquatic ornament though it is not the case in its native area. However, the sale and distribution of Nymphoides peltata is slowing becoming more controll ...
Ocimum gratissimum (African basil) Ocimum gratissimum is an herbaceous perennial grass, which is woody at its base. It is pantropical and widely naturalised in many regions. Ocimum gratissimum prefers wet and fertile conditions, but ca ...
Odocoileus virginianus (white-tailed deer) Odocoileus virginianus is a cervid, originating in the Americas, from Canada to Brazil. It has been introduced to many other countries, such as Finland, the Czech Republic, Slovakia and New Zealand. I ...
Oeceoclades maculata (monk orchid) Oeceoclades maculata is a terrestrial orchid which probably originated in Africa. Of recent introduction to the French Antilles and Florida, it is a species with invasive behaviour. Oeceoclades macula ...
Olea europaea (olive) In Europe and Northern Africa, the olive tree (Olea europaea) has been widely cultivated for its fruit and valuable oil for thousands of years (i.e. subspecies europaea). Escapes from cu ...
Oncorhynchus mykiss (redband trout) Oncorhynchus mykiss (rainbow trout) are one of the most widely introduced fish species in the world. Native to western North America, from Alaska to the Baja Peninsula, Oncorhynchus mykiss have been i ...
Onopordum acanthium (Cotton Thistle) Onopordum acanthium is a herb of the sunflower family (Asteraceae) that is native to Europe and Asia. It has been introduced to temperate climates elsewhere, including much of North America and Austr ...
Oplismenus undulatifolius (wavyleaf basketgrass) Wavyleaf basketgrass (Oplismenus hirtellus ssp. undulatifolius) is a newly discovered subspecies found in the United States which has established invasive populations in Maryland and Vir ...
Nopalea cochenillifera (cochineal cactus) An Opuntia sp. is reported to be growing in important habitats for endemic vascular flora of Ascension Island. ...
Opuntia ficus-indica (Indian-fig) Opuntia stricta is a cactus that can grow up to 2 metres in height and originates in central America. This spiny shrub favours habitats such as rocky slopes, river banks and urban areas. Opuntia stric ...
Opuntia monacantha (common pricklypear) Opuntia stricta is a cactus that can grow up to 2 metres in height and originates in central America. This spiny shrub favours habitats such as rocky slopes, river banks and urban areas. Opuntia stric ...
Opuntia stricta (Spiny pest pear) ...
Oracella acuta (acute mealybug) Mealybugs like Oracella acuta are generally small, cryptic creatures that cause major problems in agricultural and ornamental ecosystems. They are notorious invaders of new territories, with populatio ...
Orconectes rusticus (rusty crayfish) Orconectes rusticus, the rusty crayfish, is an aquatic invasive spread by anglers who use them as bait. It is native to the portions of Ohio, Indiana, Illinois, and Kentucky and has spread to s ...
Orconectes virilis (virile crayfish) Orconectes virilis is a crayfish native to the Missouri, Mississippi, Ohio, and Great Lakes drainages of the United States. It has become introduced to locations throughout the United States th ...
Oreochromis aureus (Tilapia) Oreochromis aureus (blue tilapia) is native to parts of Africa and the Middle East and is an important food source throughout the world. Oreochromis aureus are easily raised as they are resilient and ...
Oreochromis mossambicus (Mozambique mouth-breeder) Oreochromis mossambicus (Mozambique tilapia) has spread worldwide through introductions for aquaculture. Established populations of Oreochromis mossambicus in the wild are as a result of intentional r ...
Oreochromis niloticus (Nile tilapia) Oreochromis niloticus (Nile tilapia) is a highly invasive fish that plagues a variety of ecosystems, particularly those located in the tropics. Oreochromis niloticus' effective mouthbrooding reproduc ...
Orthotomicus erosus Orthotomicus erosus is an engraver beetle of the family Scolytidae. It is being introduced around the world, often due to the wood packaging material used in the shipment of textiles and other product ...
Oryctes rhinoceros (coconut rhinoceros beetle) Oryctes rhinoceros is one of the most serious pests of the coconut palm. Oryctes rhinoceros also has a record of damage, wherever it has become established in the tropics, to native palm trees and nat ...
Oryctolagus cuniculus (European Rabbit) Native to southern Europe and North Africa, the rabbit (Oryctolagus cuniculus) has been introduced to all continents, except Antarctica and Asia. In many countries, rabbits cause serious erosion of so ...
Osteopilus septentrionalis (Cuban Treefrog) The Cuban treefrog, Osteopilus septentrionalis is a voracious, nocturnal predator that eats any prey that it can grab, including members of its own species, other frogs, lizards, insects, spiders, and ...
Ostrea edulis (European flat oyster) Ostrea edulis (the European flat oyster) is native to Europe and the Mediterranean. It has been introduced to the northwestern Atlantic Ocean for aquaculture. Usually found in muddy areas, Ostrea edul ...
Ovis ammon (argali) Ovis ammon (wild sheep) are widespread from the Mediterranean to Central Asia and Siberia and several sub-species are known. Ovis ammon prefer living in the mountains and high plateaus. Its diet is pa ...
Ovis aries orientalis (mouflon) Ovis aries (sheep) are an ungulate mammal believed to have originated in Europe. While humans have domesticated the majority of sheep, feral populations exist. These populations are causing impacts on ...
Oxalis bakeriana (creeping woodsorrel) Oxalis corniculata is a cosmopolitan herb that is found worldwide. Spread of this species is due to high production of fertile seeds and its presence on all continents and many islands indicate ...
Oxalis latifolia (broadleaf woodsorrel) Oxalis latifolia is a perennial herb native to North, Central and South America. It mainly reproduces vegetatively, via bulbils and bulbs, and commonly grows in gardens, cultivated areas, orcha ...
Oxalis pes-caprae (Bermuda buttercup) Oxalis pes-caprae is a short, perennial herb that is native to southern Africa. It mainly reproduces vegetatively via bulbs, and can form large clonal colonies. Colonies flower synchronously, w ...
Cyperus blepharoleptos (Cuban bulrush) Oxycaryum cubense (Cuban bulrush) is a wetland sedge found throughout the Americas and in parts of Africa. It forms large floating mats on standing water and may be aggressive and invasive in some are ...
Oxyura jamaicensis (Ruddy Duck) Oxyura jamaicensis (ruddy duck) is native to North America. It was imported into wildfowl collections in the UK in the 1940s and subsequently escaped to form a feral population from which birds are no ...
Pacifastacus leniusculus (signal crayfish) Pacifastacus leniusculus is a large, hardy cool temperate freshwater crayfish that is found in rivers and lakes. It is endemic to northwestern USA and southwestern Canada, from where it was introduced ...
Paederia foetida (stinkvine) Paederia foetida is an aggressive, competitive vine. It can grow high into the canopy of trees in a variety of habitats. The vines climb over shrubs and trees, weighing them down and impeding regenera ...
Panicum maximum (Guinea Grass) Although Urochloa maxima is the accepted name for this species, it is still widely known as Panicum maximum. Urochloa maxima is a native of tropical Africa where it occurs from sea level to 1,800m. It ...
Panicum repens (couch panicum) Panicum repens is a perennial grass that frequently forms dense colonies and has long, creeping rhizomes. It grows in moist, often sandy soils and its rhizomes often extend several feet out into the w ...
Paratrechina longicornis (crazy ant) Paratrechina longicornis (the crazy ant) is a tramp ant, which, by definition, is an ant that is widely dispersed through commerce and other human-assisted avenues. It is extremely easy to identify by ...
Paratrechina pubens (Caribbean crazy ant) Paratrechina pubens, or the hairy crazy ant, is an invasive pest which infests residences and businesses with vast colonies. Thought native to either South America or parts of the Caribbean,
Parthenium bipinnatifidum (Santa Maria feverfew) Parthenium hysterophorus is an annual herb that aggressively colonises disturbed sites. Native to Mexico, Central and South America, Parthenium hysterophorus was accidentally introduced into several c ...
Paspalum scrobiculatum (ricegrass paspalum) Paspalum scrobiculatum is a noxious weed in the United States and is potentially invasive in the Pacific. ...
Paspalum urvillei (Vasey grass) Paspalum urvillei is a perennial grass native to tropical America, which has been widely introduced to tropical regions of the world. It is considered a weed in disturbed areas. In Hawaii, it forms de ...
Passer domesticus (House Sparrow) Passer domesticus (the house sparrow) is a small bird, native to Eurasia and northern Africa, that was intentionally introduced to the Americas. Passer domesticus are non-migratory birds that are oft ...
Passiflora edulis (passionflower) Passiflora edulis is a vigorous vine that can reach 15 metres in length. Cultivated for its fruit, Passiflora edulis has naturalised and become invasive in many countries, including New Zealand and So ...
Passiflora foetida (scarletfruit passionflower) Passiflora foetida is a perennial herbaceous vine that originates from tropical America, but is now a pantropic weed. It is a common weed in many places of the Pacific and Atlantic, where it climbs ov ...
Passiflora maliformis (conch apple) Passiflora maliformis is a vine native to the Carribean, Venezuela, Colombia and Northern Ecuador and has been introduced across the Pacific islands, including Pitcairn islands, American Samoa, Fiji, ...
Passiflora suberosa (maypop) Passiflora suberosa, like many climbers, grows on vegetation forming a blanket which cuts out light and smothers the plants (including trees) that give it support. Passiflora suberosa is invasive in m ...
Pasteurella multocida The species Pasteurella multocida includes a heterogeneous group of Gram-negative bacteria that are inhabitants of the upper respiratory tract of many vertebrate hosts ...
Paulownia tomentosa (princesstree) Paulownia tomentosa is a small to medium sized tree, native to Asia that was introduced to North America as an ornamental but is now also commercially farmed. Paulownia tomentosa grows best on moist, ...
Pennisetum clandestinum (kikuyugrass) Pennisetum clandestinum is a creeping, mat-forming grass that originates from tropical eastern Africa. It gets its common name, kikuyu grass, from the fact that it is native to the area in which the K ...
Pennisetum macrourum (African feathergrass) Pennisetum macrourum (African feather grass) is a 1 to 1.8 metre erect perennial grass native to South Africa. It has been introduced to New Zealand and Australia, where it has established and is know ...
Pennisetum polystachion (mission grass) Pennisetum polystachion (alternative spelling Pennisetum polystachyon) is a large grass species originating from Africa and India. It has spread to many Pacific islands and thrives in tropical climate ...
Pennisetum setaceum (fountaingrass) Pennisetum setaceum was introduced to the United States as an ornamental grass. It reproduces high numbers of wind-dispersed seeds that have spread outside of planted areas. Pennisetum setaceum is a d ...
Perca fluviatilis (River perch) Perca fluviatilis (perch) are a widespread species of predatory freshwater fish that are prized for angling. Their natural range is throughout much of Europe, but they have been introduced to a number ...
Perna perna (Brown mussel) Perna perna, commonly known as the brown mussel, is a bivalve mussel that has recently invaded North America, around the Gulf of Mexico. It is quickly becoming a nuisance of water-cooling systems for ...
Petromyzon marinus (Eel sucker) Petromyzon marinus (sea lamprey) is an anadromous, eel-like fish that parasitically attaches and feeds on healthy fish. Petromyzon marinus is native to the east coast of the USA and the majority of t ...
Phalaris arundinacea (reed canarygrass) Phalaris arundinacea is a cool-season perennial grass that grows successfully in northern latitudes and can be invasive in wet habitats. Since it is tolerant of freezing temperatures and begins to gro ...
Phalloceros caudimaculatus (Spottail mosquitofish) Phalloceros caudimaculatus (caudo) are a small species of live-bearing freshwater fish that originate from South America. A relative of the notoriously invasive Gambusia spp., they appear to be much l ...
Pheidole megacephala (bigheaded ant) Pheidole megacephala is one of the world's worst invasive ant species. Believed to be native to southern Africa, it is now found throughout the temperate and tropical zones of the world. It is a serio ...
Phellinus noxius Root and crown rot caused by Phellinus noxius is pantropical in distribution. Also known as brown root rot disease, it is present in native forests but most often noticed in disturbed areas. It has a ...
Philornis downsi Adult Philornis downsi flies feed on fruit, but larvae are semi-haematophagous (blood and tissue-feeding) parasites of birds. P. downsi larvae were first discovered in finch nests on San ...
Phoenix canariensis (Canary Island date palm) Phoenix canariensis is a palm tree native and endemic to the Canary Islands. It is very hardy and can establish in a variety of soil conditions. It its younger stages Phoenix canariensis fronds can be ...
Phormium tenax (New Zealand flax) New Zeland flax Phormium tenax is considered a major threat to the recovery of critically endangered plant species in Saint Helena through competition with natives. Flax also reduces suitable h ...
Phoxinus phoxinus (Minnow) Phoxinus phoxinus is a gregarious, freshwater fish that is found in cold, well oxygenated lakes and rivers. It is often associated with salmonids and is most commonly found in shallow waters. < ...
Phragmites australis (common reed) Phragmites australis grows on level ground in tidal and non-tidal marshes, lakes, swales and backwater areas of rivers and streams. It is found on sites that are seasonally flooded with not more than ...
Phyllorhiza punctata (Jellyfish) The jellyfish, Phyllorhiza punctata, has been introduced to North America from the Western Pacific Ocean and is threatening large commercial fisheries by feeding on the eggs and larvae of fish, crab a ...
Phyllostachys flexuosa (drooping timber bamboo) Originally from China, Phyllostachys flexuosa is a bamboo growing 6 to 10 metres in height. Phyllostachys flexuosa has a strong growth rate and spreads very easily via a particularly vigorous network ...
Physalis peruviana (Peruvian groundcherry) Physalis peruviana originates from the tropics and is cultivated in its native lands. It poses an indirect threat to agriculture when imported as it may harbour introduced plant pests. ...
Phytophthora cinnamomi The oomycete, Phytophthora cinnamomi, is a widespread soil-borne pathogen that infects woody plants causing root rot and cankering. It needs moist soil conditions and warm temperatures to thrive, and ...
Phytophthora lateralis Phytophthora lateralis is the causal agent of a serious root disease of Port Orford-cedar (Chamaecyparis lawsoniana), an ecologically and economically important tree. It advances quickly ...
Phytophthora pinifolia Phytophthora pinifolia is an oomycete or water mould that has been identified as the likely causal agent of a relatively new disease of Monterey pine (Pinus radiata) found in plantations ...
Phytophthora ramorum (Sudden Oak Death) Until 2000, Phytophthora ramorum, the causal agent of Sudden Oak Death, was undiscovered and unnamed. This water mould or oomycete is the cause of much concern in North America and Europe due to three ...
Pilosella floribunda Hieracium floribundum is a herbaceous perennial characterised by numerous horizontal runners and a rhizome in the ground. A native of Europe, it belongs to a genus that includes hundreds of species es ...
Pinus caribaea (Caribbean pine) Pinus caribaea is a pine tree that can grow to 30 metres. It is one of the most common trees planted for forestry in the Pacific Islands. Pinus caribaea naturalises easily and sometimes abundantly in ...
Pinus pinaster (maritime pine) Pinus pinaster, originally from the Mediterranean Basin, has been planted in temperate regions within and outside its natural range for a wide range of reasons. It regenerates readily almost everywher ...
Piper aduncum (higuillo de hoja menuda) Piper aduncum is a shrub or small tree that is a native of the West Indies and mainland tropical America from Mexico to northern Argentina. It is an invader of disturbed areas, where it is able to for ...
Pistia stratiotes (water lettuce) Pistia stratiotes is a freshwater invasive weed that is found throughout the tropics and subtropics. It is a free-floating plant that is capable of forming dense mats on the surfaces of lakes, ponds, ...
Pitangus sulphuratus (Great Kiskadee) Worldwide land snail diversity is second only to that of arthropods. Tropical oceanic islands support unique land snail faunas with high endemism; biodiversity of land snails in Pacific islands is est ...
Pittosporum tenuifolium (tawhiwhi) Pittosporum tenuifolium is a shrub or small tree that grows to about 10 m high and has bird-dispersed seeds. It is native to New Zealand and has naturalised in the Victoria, Tasmania and New ...
Pittosporum taitense (Wild Coffee) Pittosporum undulatum is an evergreen tree that is often used as an ornamental plant, due to its attractive fragrant flowers. It is native to south-eastern Australia but has now spread to a number of ...
Pittosporum viridiflorum (cape cheesewood) Pittosporum viridiflorum is a shrub/tree that has become naturalised in Hawai'i and Saint Helena. Originally cultivated in Europe as early as the 17th Century, the Dutch took the species to Sa ...
Pluchea carolinensis (cure for all) Pluchea carolinensis is a 1 to 2.5 metre high shrub. It usually occurs in open and disturbed areas, such as roadsides and pastures. This fast-growing shrub can form dense stands in dry habitats. It ca ...
Eremosis corymbosa (Indian camphorweed) Pluchea indica is a shrub that grows up to 2 meters high. With its rapid growth, it can quickly form dense stands, particularly in wetlands, and alter the habitat for certain species of birds. It may ...
Poa pratensis (Kentucky bluegrass) Kentucky bluegrass (Poa pratensis) is a rhizomatous grass that is regarded as a crop in some systems, but as a weed in others. It is highly valued as a pasture and turf grass, particularly in g ...
Poecilia reticulata (millions fish) Poecilia reticulata is a small benthopelagic fish native to Brazil, Guyana, Venezuela and the Caribbean Islands. It is a popular aquarium species and is also commonly used in genetics research. In the ...
Polistes chinensis subsp. antennalis The Asian paper wasp (Polistes chinensis antennalis) is native to areas of Japan and China and is currently a widespread introduced species in New Zealand. Research on its impact on native faun ...
Polygala paniculata (orosne) A native of tropical America, Polygala paniculata naturalises easily in disturbed areas such as roadsides, forest edges and wasteland. It can spread very rapidly and soon becomes invasive. The species ...
Persicaria perfoliata (mile-a-minute weed) Polygonum perfoliatum is an herbaceous, annual, trailing vine of the buckwheat family (Polygonaceae) that is native to Asia. It generally colonises open and disturbed areas, along the edges of woods, ...
Pomacea canaliculata (Apple snail) Pomacea canaliculata is a freshwater snail with a voracious appetite for water plants including lotus, water chestnut, taro and rice. Introduced widely from its native South America by the aquarium tr ...
Populus alba (Silver-leaf poplar) Populus alba is a member of the willow family (Salicaceae) that is native to Eurasia. It is a dioecious species and female mature trees can produce large seed crops. Populus alba spreads to new locati ...
Porcellio scaber (Sow bug) The terrestrial crustacean Porcellio scaber was first recorded on the sub-Antarctic Marion Island during a survey in April 2001. Searches conducted between September 2001 and April 2002 yielded as man ...
Porphyrio porphyrio (Purple Swamphen) The ecological similarity of the purple swamphen (Porphyrio porphyrio) to the Florida native common moorhen (Gallinula chloropus) and purple gallinule (Porphyrula martinica) have ...
Potamocorbula amurensis (Amur river clam) The suspension-feeding clam, Potamocorbula amurensis is native to Japan, China and Korea in tropical to cold temperate waters. Known as the Asian or Chinese clam, it has been designated as a major bil ...
Potamogeton crispus (curly pondweed) Potamogeton crispus is an aquatic plant that grows in fresh and slightly brackish waters. It becomes invasive in some areas because of its tolerance to low light and low water temperatures. These tole ...
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Invasive Status provided by Global Invasive Species Database Downloaded on 10 May 2011.