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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
146 observations in the last 30 days
100% introduced
Chicken
Gallus gallus domesticus
283 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,099 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
230 observations in the last 30 days
99.52% introduced
European fallow deer
Dama dama
113 observations in the last 30 days
99.39% introduced
Brown anole
Anolis sagrei
1,584 observations in the last 30 days
99.36% introduced
Cattle
Bos taurus
89 observations in the last 30 days
97.87% introduced
Domestic sheep
Ovis aries
68 observations in the last 30 days
97.25% introduced
Brown marmorated stink bug
Halyomorpha halys
762 observations in the last 30 days
96.49% introduced
Box tree moth
Cydalima perspectalis
18 observations in the last 30 days
96.15% introduced
House mouse
Mus musculus
88 observations in the last 30 days
95.67% introduced
Asian ladybeetle
Harmonia axyridis
2,978 observations in the last 30 days
95.33% introducedYak
Bos grunniens
Six observations in the last 30 days
94.51% introducedCommon pheasant
Phasianus colchicus
950 observations in the last 30 days
94.34% introduced
Domestic dog
Canis lupus familiaris
404 observations in the last 30 days
93.2% introducedDomestic duck
Anas platyrhynchos domesticus
958 observations in the last 30 days
92.15% introduced
Nutria
Myocastor coypus
450 observations in the last 30 days
87.83% introduced
Domestic goat
Capra hircus
102 observations in the last 30 days
85.33% introduced
Egyptian goose
Alopochen aegyptiaca
1,222 observations in the last 30 days
85.32% introduced
Llama
Lama glama
Seven observations in the last 30 days
82.08% introduced
European honey bee
Apis mellifera
3,738 observations in the last 30 days
81.05% introducedEuropean rabbit
Oryctolagus cuniculus
502 observations in the last 30 days
79.1% introduced
Domestic house spider
Tegenaria domestica
86 observations in the last 30 days
76.76% introduced
European paper wasp
Polistes dominula
534 observations in the last 30 days
74.51% introduced
Common pill woodlouse
Armadillidium vulgare
1,743 observations in the last 30 days
72.67% introduced
Arion
Arion species
175 observations in the last 30 days
72.58% introduced
Common earthworm
Lumbricus terrestris
76 observations in the last 30 days
69.72% introduced
Madagascar giant day gecko
Phelsuma grandis
25 observations in the last 30 days
64.61% introducedRock dove
Columba livia
4,082 observations in the last 30 days
60.96% introduced
Indian peafowl
Pavo cristatus
366 observations in the last 30 days
60.06% introduced
Garden snail
Cornu aspersum
1,433 observations in the last 30 days
57.96% introduced
Common green bottle fly
Lucilia sericata
30 observations in the last 30 days
53.59% introduced
Leopard slug
Limax maximus
356 observations in the last 30 days
52.03% introduced
Bathroom moth midge
Clogmia albipunctata
311 observations in the last 30 days
50.45% introduced
Housefly
Musca domestica
40 observations in the last 30 days
46.68% introduced
Eurasian collared dove
Streptopelia decaocto
1,541 observations in the last 30 days
46.49% introducedShore crab
Carcinus maenas
256 observations in the last 30 days
45.35% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
43.55% introduced
Common striped woodlouse
Philoscia muscorum
577 observations in the last 30 days
37.31% introduced
European garden spider
Araneus diadematus
59 observations in the last 30 days
36.86% introduced
Seven-spot ladybird
Coccinella septempunctata
4,583 observations in the last 30 days
36.53% introduced
Domestic guinea pig
Cavia porcellus
Four observations in the last 30 days
36.4% introduced
Superworm
Zophobas atratus
Four observations in the last 30 days
35.11% introduced
Grove snail
Cepaea nemoralis
704 observations in the last 30 days
33.48% introduced
Common leopard gecko
Eublepharis macularius
Four observations in the last 30 days
31.67% introduced
Buff-tailed bumblebee
Bombus terrestris
746 observations in the last 30 days
30.71% introduced
European hornet
Vespa crabro
86 observations in the last 30 days
28.3% introducedSickle-bearing bush cricket
Phaneroptera species
18 observations in the last 30 days
24.88% introduced
Dromedary
Camelus dromedarius
23 observations in the last 30 days
24.59% introduced
Yellow mealworm beetle
Tenebrio molitor
Five observations in the last 30 days
22.68% introduced
Mute swan
Cygnus olor
1,793 observations in the last 30 days
21.55% introduced
Common crab spider
Xysticus cristatus
Four observations in the last 30 days
20.89% introduced
Human flea
Pulex irritans
Five observations in the last 30 days
20% introduced
Crane fly
Tipula species
133 observations in the last 30 days
16.8% introduced
Brown-tail moth
Euproctis chrysorrhoea
11 observations in the last 30 days
15.69% introduced
Devil's coach-horse beetle
Ocypus olens
37 observations in the last 30 days
15.1% introduced
Canada goose
Branta canadensis
4,355 observations in the last 30 days
14.04% introduced
Common wasp
Vespula vulgaris
189 observations in the last 30 days
11.87% introduced
Garden banded snail
Cepaea hortensis
97 observations in the last 30 days
8.06% introduced
Domestic silk moth
Bombyx mori
No observations in the last 30 days
8% introduced
Mallard
Anas platyrhynchos
5,918 observations in the last 30 days
6.86% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
296 observations in the last 30 days
5.55% introduced
Firebug
Pyrrhocoris apterus
1,724 observations in the last 30 days
4.66% introduced
Two-spot ladybird
Adalia bipunctata
279 observations in the last 30 days
4.65% introduced
Monarch butterfly
Danaus plexippus
1,435 observations in the last 30 days
4.13% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Five observations in the last 30 days
3.85% introduced
Drugstore beetle
Stegobium paniceum
Eight observations in the last 30 days
2.84% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Six observations in the last 30 days
2.75% introduced
Desert locust
Schistocerca gregaria
96 observations in the last 30 days
2.27% introduced
Flesh fly
Sarcophaga species
Five observations in the last 30 days
2.01% introduced
Two-spotted cricket
Gryllus bimaculatus
19 observations in the last 30 days
1.93% introduced
Corn snake
Pantherophis guttatus
103 observations in the last 30 days
1.76% introduced
Great house spider
Eratigena atrica
151 observations in the last 30 days
1.23% introduced
Dubia roach
Blaptica dubia
No observations in the last 30 days
0.64% introduced
Sahara frog
Pelophylax saharicus
14 observations in the last 30 days
0.63% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
317 observations in the last 30 days
0.61% introduced
Bactrian camel
Camelus bactrianus
One observation in the last 30 days
0.39% introducedPicnic beetle
Glischrochilus quadrisignatus
16 observations in the last 30 days
0.38% introduced
Sac spider
Clubiona species
28 observations in the last 30 days
0.14% introduced
Garden bumblebee
Bombus hortorum
55 observations in the last 30 days
0.11% introduced
Rook
Corvus frugilegus
1,296 observations in the last 30 days
0.04% introduced
Sand lizard
Lacerta agilis
142 observations in the last 30 days
0.04% introduced
Forest cockroach
Planuncus tingitanus sensu lato
Two observations in the last 30 days
0.04% introduced