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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 cat
Felis catus
968 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
132 observations in the last 30 days
100% introduced
Cattle
Bos taurus
79 observations in the last 30 days
99.81% introduced
European fallow deer
Dama dama
109 observations in the last 30 days
99.64% introduced
Giant African land snail
Lissachatina fulica
356 observations in the last 30 days
99.61% introduced
Brown anole
Anolis sagrei
1,343 observations in the last 30 days
99.39% introduced
Asian ladybeetle
Harmonia axyridis
3,824 observations in the last 30 days
96.93% introduced
House mouse
Mus musculus
89 observations in the last 30 days
96.21% introduced
Brown marmorated stink bug
Halyomorpha halys
1,011 observations in the last 30 days
95.94% introduced
Domestic sheep
Ovis aries
68 observations in the last 30 days
95.73% introduced
Box tree moth
Cydalima perspectalis
101 observations in the last 30 days
94.7% introduced
Domestic dog
Canis lupus familiaris
346 observations in the last 30 days
93.93% introduced
Nutria
Myocastor coypus
268 observations in the last 30 days
88.3% introduced
Llama
Lama glama
Eight observations in the last 30 days
87.82% introduced
Domestic goat
Capra hircus
116 observations in the last 30 days
84.51% introduced
European honey bee
Apis mellifera
3,130 observations in the last 30 days
82.59% introduced
Egyptian goose
Alopochen aegyptiaca
594 observations in the last 30 days
80.05% introduced
European paper wasp
Polistes dominula
252 observations in the last 30 days
78.41% introduced
Domestic house spider
Tegenaria domestica
32 observations in the last 30 days
75.31% introduced
Arion
Arion species
175 observations in the last 30 days
70.31% introduced
Common earthworm
Lumbricus terrestris
56 observations in the last 30 days
68% introduced
Indian peafowl
Pavo cristatus
219 observations in the last 30 days
64.38% introduced
Madagascar giant day gecko
Phelsuma grandis
14 observations in the last 30 days
59.47% introduced
Common pill woodlouse
Armadillidium vulgare
475 observations in the last 30 days
57.33% introduced
Garden snail
Cornu aspersum
992 observations in the last 30 days
56.04% introduced
Bathroom moth midge
Clogmia albipunctata
249 observations in the last 30 days
53.71% introduced
Eurasian collared dove
Streptopelia decaocto
778 observations in the last 30 days
51.22% introduced
Common green bottle fly
Lucilia sericata
34 observations in the last 30 days
48.45% introduced
Domestic guinea pig
Cavia porcellus
Eight observations in the last 30 days
47.92% introduced
Leopard slug
Limax maximus
371 observations in the last 30 days
47.78% introduced
Jamaican field cricket
Gryllus assimilis
Seven observations in the last 30 days
46.15% introduced
Housefly
Musca domestica
37 observations in the last 30 days
43.79% introduced
Seven-spot ladybird
Coccinella septempunctata
1,041 observations in the last 30 days
41.72% introduced
Common leopard gecko
Eublepharis macularius
Three observations in the last 30 days
40% introduced
European garden spider
Araneus diadematus
923 observations in the last 30 days
36.29% introduced
Grove snail
Cepaea nemoralis
441 observations in the last 30 days
34.94% introduced
European hornet
Vespa crabro
405 observations in the last 30 days
32.1% introduced
Dromedary
Camelus dromedarius
17 observations in the last 30 days
27.64% introduced
Common striped woodlouse
Philoscia muscorum
253 observations in the last 30 days
27.27% introduced
Mute swan
Cygnus olor
1,158 observations in the last 30 days
22.71% introduced
Brown-tail moth
Euproctis chrysorrhoea
Four observations in the last 30 days
20.99% introduced
Buff-tailed bumblebee
Bombus terrestris
267 observations in the last 30 days
20.68% introduced
Yellow mealworm beetle
Tenebrio molitor
Eight observations in the last 30 days
17.34% introduced
Common crab spider
Xysticus cristatus
19 observations in the last 30 days
15.91% introduced
Sickle-bearing bush cricket
Phaneroptera species
276 observations in the last 30 days
15.8% introduced
Crane fly
Tipula species
82 observations in the last 30 days
14.96% introduced
Canada goose
Branta canadensis
2,170 observations in the last 30 days
12.62% introduced
Devil's coach-horse beetle
Ocypus olens
138 observations in the last 30 days
12.52% introduced
Mallard
Anas platyrhynchos
4,500 observations in the last 30 days
10.09% introduced
Common wasp
Vespula vulgaris
199 observations in the last 30 days
7.58% introduced
Garden banded snail
Cepaea hortensis
94 observations in the last 30 days
7.27% introduced
Domestic silk moth
Bombyx mori
Two observations in the last 30 days
6.9% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
6.67% introduced
Firebug
Pyrrhocoris apterus
460 observations in the last 30 days
5.45% introduced
Alpaca
Vicugna pacos
Eight observations in the last 30 days
5.26% introduced
Roman snail
Helix pomatia
87 observations in the last 30 days
5.21% introduced
Monarch butterfly
Danaus plexippus
2,573 observations in the last 30 days
3.55% introduced
Desert locust
Schistocerca gregaria
Seven observations in the last 30 days
3.28% introduced
Two-spotted cricket
Gryllus bimaculatus
95 observations in the last 30 days
3.02% introduced
Drugstore beetle
Stegobium paniceum
Eight observations in the last 30 days
2.52% introduced
Two-spot ladybird
Adalia bipunctata
406 observations in the last 30 days
1.99% introduced
Corn snake
Pantherophis guttatus
97 observations in the last 30 days
1.18% introduced
Great house spider
Eratigena atrica
87 observations in the last 30 days
0.87% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
194 observations in the last 30 days
0.73% introduced
Sahara frog
Pelophylax saharicus
16 observations in the last 30 days
0.65% introducedPicnic beetle
Glischrochilus quadrisignatus
Seven observations in the last 30 days
0.29% introduced
Garden bumblebee
Bombus hortorum
Eight observations in the last 30 days
0.1% introduced
Rook
Corvus frugilegus
625 observations in the last 30 days
0.07% introduced
Sand lizard
Lacerta agilis
21 observations in the last 30 days
0.04% introduced