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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
1,000 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
158 observations in the last 30 days
100% introduced
Cattle
Bos taurus
83 observations in the last 30 days
100% introduced
Giant African land snail
Lissachatina fulica
279 observations in the last 30 days
99.58% introduced
Brown anole
Anolis sagrei
896 observations in the last 30 days
99.53% introduced
European fallow deer
Dama dama
49 observations in the last 30 days
99.11% introduced
Asian ladybeetle
Harmonia axyridis
3,845 observations in the last 30 days
97.48% introduced
Domestic dog
Canis lupus familiaris
276 observations in the last 30 days
96.78% introduced
House mouse
Mus musculus
88 observations in the last 30 days
96.15% introduced
Domestic sheep
Ovis aries
62 observations in the last 30 days
95.7% introduced
Brown marmorated stink bug
Halyomorpha halys
1,054 observations in the last 30 days
93.34% introduced
Nutria
Myocastor coypus
299 observations in the last 30 days
92.26% introduced
Box tree moth
Cydalima perspectalis
707 observations in the last 30 days
90.33% introduced
Llama
Lama glama
15 observations in the last 30 days
87.9% introduced
Egyptian goose
Alopochen aegyptiaca
647 observations in the last 30 days
87.09% introduced
Domestic goat
Capra hircus
118 observations in the last 30 days
83.79% introduced
European honey bee
Apis mellifera
4,200 observations in the last 30 days
78.86% introduced
Domestic house spider
Tegenaria domestica
140 observations in the last 30 days
75% introduced
European paper wasp
Polistes dominula
1,594 observations in the last 30 days
74.17% introduced
Common earthworm
Lumbricus terrestris
47 observations in the last 30 days
71.77% introduced
Arion
Arion species
266 observations in the last 30 days
66.65% introduced
Indian peafowl
Pavo cristatus
282 observations in the last 30 days
63.75% introduced
Madagascar giant day gecko
Phelsuma grandis
14 observations in the last 30 days
59.26% introduced
Garden snail
Cornu aspersum
1,191 observations in the last 30 days
55.19% introduced
Common pill woodlouse
Armadillidium vulgare
632 observations in the last 30 days
55.07% introduced
Eurasian collared dove
Streptopelia decaocto
998 observations in the last 30 days
51.69% introduced
Bathroom moth midge
Clogmia albipunctata
219 observations in the last 30 days
51.15% introduced
Common green bottle fly
Lucilia sericata
102 observations in the last 30 days
50.37% introduced
Domestic guinea pig
Cavia porcellus
Nine observations in the last 30 days
48.33% introduced
Leopard slug
Limax maximus
811 observations in the last 30 days
44.33% introduced
Seven-spot ladybird
Coccinella septempunctata
2,235 observations in the last 30 days
41.07% introduced
Common leopard gecko
Eublepharis macularius
Three observations in the last 30 days
38.71% introduced
Housefly
Musca domestica
38 observations in the last 30 days
35.98% introduced
Grove snail
Cepaea nemoralis
1,280 observations in the last 30 days
33.95% introduced
European hornet
Vespa crabro
750 observations in the last 30 days
31.2% introduced
European garden spider
Araneus diadematus
1,256 observations in the last 30 days
28.4% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
27.27% introduced
Dromedary
Camelus dromedarius
Four observations in the last 30 days
24.14% introduced
Common striped woodlouse
Philoscia muscorum
168 observations in the last 30 days
24.13% introduced
Mute swan
Cygnus olor
1,137 observations in the last 30 days
22.67% introduced
Brown-tail moth
Euproctis chrysorrhoea
255 observations in the last 30 days
22.48% introduced
Devil's coach-horse beetle
Ocypus olens
102 observations in the last 30 days
19.04% introduced
Yellow mealworm beetle
Tenebrio molitor
49 observations in the last 30 days
17.11% introduced
Common crab spider
Xysticus cristatus
12 observations in the last 30 days
16.09% introduced
Common wasp
Vespula vulgaris
204 observations in the last 30 days
15.52% introduced
Sickle-bearing bush cricket
Phaneroptera species
265 observations in the last 30 days
14.02% introduced
Canada goose
Branta canadensis
2,212 observations in the last 30 days
12.26% introduced
Buff-tailed bumblebee
Bombus terrestris
274 observations in the last 30 days
10.77% introduced
Mallard
Anas platyrhynchos
3,903 observations in the last 30 days
8.39% introduced
Crane fly
Tipula species
232 observations in the last 30 days
7.78% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
7.69% introduced
Garden banded snail
Cepaea hortensis
343 observations in the last 30 days
6.8% introduced
Monarch butterfly
Danaus plexippus
4,475 observations in the last 30 days
6.09% introduced
Roman snail
Helix pomatia
1,092 observations in the last 30 days
4.98% introduced
Firebug
Pyrrhocoris apterus
806 observations in the last 30 days
4.81% introduced
Alpaca
Vicugna pacos
Seven observations in the last 30 days
3.05% introduced
Drugstore beetle
Stegobium paniceum
Four observations in the last 30 days
2.36% introduced
Two-spot ladybird
Adalia bipunctata
400 observations in the last 30 days
1.77% introduced
Two-spotted cricket
Gryllus bimaculatus
67 observations in the last 30 days
1.58% introduced
Sahara frog
Pelophylax saharicus
Ten observations in the last 30 days
1.01% introduced
Corn snake
Pantherophis guttatus
68 observations in the last 30 days
0.87% introduced
Desert locust
Schistocerca gregaria
Two observations in the last 30 days
0.69% introduced
Great house spider
Eratigena atrica
66 observations in the last 30 days
0.67% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
687 observations in the last 30 days
0.46% introduced
Rook
Corvus frugilegus
315 observations in the last 30 days
0.04% introduced
Sand lizard
Lacerta agilis
508 observations in the last 30 days
0.03% introduced