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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
181 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,016 observations in the last 30 days
99.98% introduced
Cattle
Bos taurus
125 observations in the last 30 days
99.91% introduced
Giant African land snail
Lissachatina fulica
378 observations in the last 30 days
99.58% introduced
European fallow deer
Dama dama
56 observations in the last 30 days
99.39% introduced
Brown anole
Anolis sagrei
1,114 observations in the last 30 days
99.22% introduced
Domestic sheep
Ovis aries
63 observations in the last 30 days
97.09% introduced
Brown marmorated stink bug
Halyomorpha halys
1,010 observations in the last 30 days
96.11% introduced
Asian ladybeetle
Harmonia axyridis
5,882 observations in the last 30 days
95.87% introduced
Box tree moth
Cydalima perspectalis
1,485 observations in the last 30 days
95.79% introduced
House mouse
Mus musculus
57 observations in the last 30 days
95.52% introduced
Domestic dog
Canis lupus familiaris
356 observations in the last 30 days
92.43% introduced
Nutria
Myocastor coypus
386 observations in the last 30 days
89.71% introduced
Egyptian goose
Alopochen aegyptiaca
849 observations in the last 30 days
85.08% introduced
Llama
Lama glama
11 observations in the last 30 days
83.48% introduced
Domestic goat
Capra hircus
140 observations in the last 30 days
82.43% introduced
European honey bee
Apis mellifera
5,200 observations in the last 30 days
79.31% introduced
Domestic house spider
Tegenaria domestica
228 observations in the last 30 days
76.99% introduced
European paper wasp
Polistes dominula
1,053 observations in the last 30 days
74.82% introduced
Arion
Arion species
513 observations in the last 30 days
72.93% introduced
Common earthworm
Lumbricus terrestris
35 observations in the last 30 days
70.64% introduced
Madagascar giant day gecko
Phelsuma grandis
12 observations in the last 30 days
67.87% introduced
Common pill woodlouse
Armadillidium vulgare
1,778 observations in the last 30 days
67.59% introduced
Indian peafowl
Pavo cristatus
340 observations in the last 30 days
63.61% introduced
Garden snail
Cornu aspersum
1,465 observations in the last 30 days
55.84% introduced
Bathroom moth midge
Clogmia albipunctata
212 observations in the last 30 days
53.93% introduced
Leopard slug
Limax maximus
551 observations in the last 30 days
48.73% introduced
Eurasian collared dove
Streptopelia decaocto
1,122 observations in the last 30 days
48.42% introduced
Common green bottle fly
Lucilia sericata
79 observations in the last 30 days
47.36% introduced
Housefly
Musca domestica
60 observations in the last 30 days
47.14% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
46.43% introduced
Common striped woodlouse
Philoscia muscorum
353 observations in the last 30 days
39.43% introduced
Seven-spot ladybird
Coccinella septempunctata
4,227 observations in the last 30 days
38.97% introduced
Domestic guinea pig
Cavia porcellus
Seven observations in the last 30 days
37.22% introduced
Common leopard gecko
Eublepharis macularius
Four observations in the last 30 days
36.17% introduced
European garden spider
Araneus diadematus
993 observations in the last 30 days
35.49% introduced
Grove snail
Cepaea nemoralis
1,629 observations in the last 30 days
34.66% introduced
European hornet
Vespa crabro
685 observations in the last 30 days
27.51% introduced
Dromedary
Camelus dromedarius
Eight observations in the last 30 days
23.41% introduced
Yellow mealworm beetle
Tenebrio molitor
42 observations in the last 30 days
23.29% introduced
Sickle-bearing bush cricket
Phaneroptera species
275 observations in the last 30 days
23.12% introduced
Buff-tailed bumblebee
Bombus terrestris
484 observations in the last 30 days
23% introduced
Mute swan
Cygnus olor
1,417 observations in the last 30 days
22.61% introduced
Common crab spider
Xysticus cristatus
16 observations in the last 30 days
21.73% introduced
Human flea
Pulex irritans
Five observations in the last 30 days
20% introduced
Crane fly
Tipula species
196 observations in the last 30 days
15.69% introduced
Brown-tail moth
Euproctis chrysorrhoea
183 observations in the last 30 days
15.52% introduced
Devil's coach-horse beetle
Ocypus olens
106 observations in the last 30 days
14.46% introduced
Canada goose
Branta canadensis
2,506 observations in the last 30 days
12.98% introduced
Common wasp
Vespula vulgaris
268 observations in the last 30 days
11.97% introduced
Mallard
Anas platyrhynchos
4,270 observations in the last 30 days
9.06% introduced
Garden banded snail
Cepaea hortensis
431 observations in the last 30 days
8.4% introduced
Roman snail
Helix pomatia
1,155 observations in the last 30 days
5.6% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Monarch butterfly
Danaus plexippus
5,250 observations in the last 30 days
5.18% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
5% introduced
Domestic silk moth
Bombyx mori
Two observations in the last 30 days
4.76% introduced
Firebug
Pyrrhocoris apterus
1,403 observations in the last 30 days
4.45% introduced
Two-spot ladybird
Adalia bipunctata
747 observations in the last 30 days
3.33% introduced
Two-spotted cricket
Gryllus bimaculatus
77 observations in the last 30 days
2.31% introduced
Drugstore beetle
Stegobium paniceum
27 observations in the last 30 days
2.15% introduced
Desert locust
Schistocerca gregaria
Five observations in the last 30 days
1.91% introduced
Corn snake
Pantherophis guttatus
120 observations in the last 30 days
1.63% introduced
Flesh fly
Sarcophaga species
23 observations in the last 30 days
1.55% introduced
Great house spider
Eratigena atrica
73 observations in the last 30 days
0.96% introduced
Sahara frog
Pelophylax saharicus
18 observations in the last 30 days
0.82% introduced
Dubia roach
Blaptica dubia
Two observations in the last 30 days
0.79% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
1,837 observations in the last 30 days
0.56% introduced
Bactrian camel
Camelus bactrianus
Five observations in the last 30 days
0.5% introducedPicnic beetle
Glischrochilus quadrisignatus
22 observations in the last 30 days
0.31% introduced
Sac spider
Clubiona species
23 observations in the last 30 days
0.18% introduced
Garden bumblebee
Bombus hortorum
238 observations in the last 30 days
0.13% introduced
Rook
Corvus frugilegus
340 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
600 observations in the last 30 days
0.05% introduced