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Neozoa
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Neozoa (invasive species) are animal species that move into new areas through human activities and establish themselves there. This can happen in a variety of ways, such as the exotic pet trade, the release of animals from captivity, or the unwanted introduction of species via ships or other means of transport. Neozoa can include both terrestrial and aquatic species.
The introduction of neozoa into new ecosystems can have far-reaching ecological and cultural consequences. On the one hand, they can threaten native species, either through direct competition for resources or through the transmission of diseases. On the other hand, they can also change human perceptions of nature and wildlife by introducing new species into landscapes that did not previously exist.
The management of invasive species therefore requires careful monitoring and management measures to minimize their impact on biodiversity and human health. This may include controlling invasive species, restoring habitats and raising public awareness of the risks and consequences of introducing neozoa.
Overall, neozoa illustrate the complex interactions between human activities, biological diversity, and cultural practices. Their occurrence and spread are closely linked to global trade and transport flows and underline the importance of an integrated and coordinated approach to the protection and conservation of ecosystems worldwide.
This list shows species ordered by the proportion of observations marked as "introduced". The data is based on observations from iNaturalist users and therefore may contain inaccurate information.
The percentage value shown implies how many observations were made outside the original distribution area.
Domestic horse
Equus ferus caballus
358 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,678 observations in the last 30 days
99.99% introduced
Cattle
Bos taurus
311 observations in the last 30 days
99.89% introduced
Giant African land snail
Lissachatina fulica
587 observations in the last 30 days
99.53% introduced
European fallow deer
Dama dama
112 observations in the last 30 days
99.42% introduced
Brown anole
Anolis sagrei
1,607 observations in the last 30 days
99.14% introduced
Domestic sheep
Ovis aries
246 observations in the last 30 days
96.92% introduced
Asian ladybeetle
Harmonia axyridis
6,518 observations in the last 30 days
96.34% introduced
Brown marmorated stink bug
Halyomorpha halys
979 observations in the last 30 days
96.04% introduced
House mouse
Mus musculus
84 observations in the last 30 days
95.58% introduced
Box tree moth
Cydalima perspectalis
285 observations in the last 30 days
94.86% introduced
Domestic dog
Canis lupus familiaris
864 observations in the last 30 days
92.97% introduced
Nutria
Myocastor coypus
488 observations in the last 30 days
89.85% introduced
Egyptian goose
Alopochen aegyptiaca
1,372 observations in the last 30 days
84.38% introduced
Llama
Lama glama
47 observations in the last 30 days
83.94% introduced
Domestic goat
Capra hircus
266 observations in the last 30 days
81.74% introduced
European honey bee
Apis mellifera
6,171 observations in the last 30 days
80.51% introduced
European paper wasp
Polistes dominula
787 observations in the last 30 days
75.43% introduced
Domestic house spider
Tegenaria domestica
111 observations in the last 30 days
74.55% introduced
Common earthworm
Lumbricus terrestris
175 observations in the last 30 days
71.22% introduced
Arion
Arion species
518 observations in the last 30 days
70.59% introduced
Common pill woodlouse
Armadillidium vulgare
3,070 observations in the last 30 days
67.21% introduced
Madagascar giant day gecko
Phelsuma grandis
Ten observations in the last 30 days
65.73% introduced
Indian peafowl
Pavo cristatus
696 observations in the last 30 days
62.97% introduced
Garden snail
Cornu aspersum
2,371 observations in the last 30 days
56.69% introduced
Bathroom moth midge
Clogmia albipunctata
328 observations in the last 30 days
54.97% introduced
Eurasian collared dove
Streptopelia decaocto
1,920 observations in the last 30 days
49.25% introduced
Leopard slug
Limax maximus
544 observations in the last 30 days
49.18% introduced
Housefly
Musca domestica
200 observations in the last 30 days
47.66% introduced
Common green bottle fly
Lucilia sericata
121 observations in the last 30 days
47.47% introduced
Jamaican field cricket
Gryllus assimilis
Four observations in the last 30 days
44.44% introduced
Seven-spot ladybird
Coccinella septempunctata
4,560 observations in the last 30 days
41.74% introduced
Domestic guinea pig
Cavia porcellus
30 observations in the last 30 days
38.89% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
37.78% introduced
European garden spider
Araneus diadematus
246 observations in the last 30 days
36.81% introduced
Common striped woodlouse
Philoscia muscorum
776 observations in the last 30 days
34.94% introduced
Grove snail
Cepaea nemoralis
1,865 observations in the last 30 days
34.81% introduced
European hornet
Vespa crabro
1,131 observations in the last 30 days
30.42% introduced
Buff-tailed bumblebee
Bombus terrestris
530 observations in the last 30 days
25.43% introduced
Yellow mealworm beetle
Tenebrio molitor
Eight observations in the last 30 days
24.84% introduced
Mute swan
Cygnus olor
2,284 observations in the last 30 days
22.97% introduced
Dromedary
Camelus dromedarius
17 observations in the last 30 days
22.03% introduced
Common crab spider
Xysticus cristatus
53 observations in the last 30 days
21.71% introduced
Sickle-bearing bush cricket
Phaneroptera species
155 observations in the last 30 days
20.31% introduced
Crane fly
Tipula species
937 observations in the last 30 days
16.37% introduced
Brown-tail moth
Euproctis chrysorrhoea
280 observations in the last 30 days
15.19% introduced
Devil's coach-horse beetle
Ocypus olens
42 observations in the last 30 days
14.21% introduced
Common wasp
Vespula vulgaris
407 observations in the last 30 days
13.2% introduced
Canada goose
Branta canadensis
6,717 observations in the last 30 days
12.46% introduced
Mallard
Anas platyrhynchos
8,200 observations in the last 30 days
9.33% introduced
Garden banded snail
Cepaea hortensis
577 observations in the last 30 days
7.73% introduced
Domestic silk moth
Bombyx mori
One observation in the last 30 days
5.71% introduced
Alpaca
Vicugna pacos
21 observations in the last 30 days
5.58% introduced
Monarch butterfly
Danaus plexippus
2,085 observations in the last 30 days
5.57% introduced
Roman snail
Helix pomatia
1,659 observations in the last 30 days
5.25% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
5% introduced
Firebug
Pyrrhocoris apterus
1,982 observations in the last 30 days
4.82% introduced
Two-spot ladybird
Adalia bipunctata
826 observations in the last 30 days
4.18% introduced
Drugstore beetle
Stegobium paniceum
Ten observations in the last 30 days
2.93% introduced
Two-spotted cricket
Gryllus bimaculatus
81 observations in the last 30 days
2.51% introduced
Flesh fly
Sarcophaga species
33 observations in the last 30 days
1.88% introduced
Desert locust
Schistocerca gregaria
22 observations in the last 30 days
1.73% introduced
Corn snake
Pantherophis guttatus
283 observations in the last 30 days
1.42% introduced
Great house spider
Eratigena atrica
99 observations in the last 30 days
0.84% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
160 observations in the last 30 days
0.81% introduced
Dubia roach
Blaptica dubia
Three observations in the last 30 days
0.8% introduced
Sahara frog
Pelophylax saharicus
68 observations in the last 30 days
0.73% introduced
Bactrian camel
Camelus bactrianus
Eight observations in the last 30 days
0.55% introducedPicnic beetle
Glischrochilus quadrisignatus
138 observations in the last 30 days
0.36% introduced
Garden bumblebee
Bombus hortorum
394 observations in the last 30 days
0.17% introduced
Rook
Corvus frugilegus
733 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
1,122 observations in the last 30 days
0.03% introduced