Nearctic-introduced
Guides
Coleophora badiipennella
Pale Elm Case-bearer
Coleophora badiipennella is a small case-bearing moth in the family Coleophoridae, first described by Duponchel in 1843. It is widely distributed across Europe and has been introduced to North America. The species is associated with several deciduous tree genera, particularly elms. Adults are active in early summer.
Cryptopleurum subtile
Cryptopleurum subtile is a small water scavenger beetle in the family Hydrophilidae, described by David Sharp in 1884. The species has a broad native distribution across East Asia and has been introduced to Europe and North America. It belongs to the subfamily Sphaeridiinae, a group characterized by compact body forms and association with moist or aquatic habitats.
Lygocoris rugicollis
Apple Capsid
Lygocoris rugicollis is a widespread plant-feeding bug in the family Miridae, commonly known as the Apple Capsid. Adults are small, yellow, and distinguished by a strongly wrinkled prothorax. The species has a broad geographic range spanning Europe, North Africa, Central Asia, and North America. It is primarily associated with willows and alders but has been reported as an occasional pest on cultivated fruit crops.
Megasternum concinnum
Megasternum concinnum is a small water scavenger beetle in the family Hydrophilidae. It has a broad native distribution across Europe, North Africa, and western Asia, and has been introduced to western North America. The species belongs to the subfamily Sphaeridiinae, whose members are generally associated with moist organic substrates rather than truly aquatic habitats.
Micropeza corrigiolata
stilt-legged fly
Micropeza corrigiolata is a small stilt-legged fly in the family Micropezidae, characterized by its elongated legs and slender black body with yellow abdominal markings. The species is widespread across Europe, the Near East, and has been introduced to the Nearctic realm. Adults are active during summer months and are predatory on small insects, while larvae develop as root feeders on leguminous plants.
Onthophagus nuchicornis
Small black-and-brown Dung Beetle
Onthophagus nuchicornis is a Palearctic dung beetle introduced to North America in the 1840s, now established across Canada and the northern United States. The species exhibits generalist coprophagy, successfully reproducing using dung from both domestic livestock and indigenous mammals including bobcat, moose, red fox, and raccoon. It possesses an obligatory cold reproductive diapause restricting it to a single generation per year. In the United Kingdom, it is listed as Vulnerable, while in North America it is abundant and has been employed as a model organism for ecotoxicological studies of ivermectin effects on dung burial behavior.
dung-beetleintroduced-speciescoprophagediapauseecotoxicology-modelpasture-ecosystemsexual-dimorphismivermectin-effectsgeneralist-feederPalaearctic-nativeNearctic-introducedsingle-generation-per-yearbrood-balltunneling-behaviorcompetition-with-native-speciesCLIMEX-bioclimatic-modelnutrient-cyclingsoil-aerationcattle-pasture-managementVulnerable-(UK)Otophorus haemorrhoidalis
Otophorus haemorrhoidalis is a species of dung beetle in the family Scarabaeidae, subfamily Aphodiinae. It has a broad distribution spanning the Palearctic region (Europe, Asia, and North Africa) and has been introduced to the Nearctic region (North America), where it is established in Canada and the United States. The species is associated with dung habitats and plays a role in nutrient cycling. Despite its wide distribution, detailed biological studies on this species remain limited.
Priobium carpini
death-watch beetle
Priobium carpini is a species of death-watch beetle in the family Ptinidae, first described by Herbst in 1793. It is native to Europe and northern Asia (excluding China) and has been introduced to North America. The species is associated with wood-boring habits typical of the family. It is one of approximately 72 documented observations on iNaturalist.
Psammodius basalis
Psammodius basalis is a small aphodiine dung beetle in the family Scarabaeidae. The species is native to the Palaearctic region and has been introduced to North America, where it is established in Maryland. As a member of the subfamily Aphodiinae, it belongs to a group commonly known as small dung beetles or aphodiines that are associated with decomposing organic matter. The genus Psammodius is distinguished by adaptations to sandy habitats.