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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
285 observations in the last 30 days
100% introduced
Chicken
Gallus gallus domesticus
418 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,485 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
303 observations in the last 30 days
99.58% introduced
Brown anole
Anolis sagrei
2,034 observations in the last 30 days
99.44% introduced
European fallow deer
Dama dama
60 observations in the last 30 days
99.41% introduced
Domestic sheep
Ovis aries
97 observations in the last 30 days
97.55% introduced
Cattle
Bos taurus
167 observations in the last 30 days
97.32% introduced
Brown marmorated stink bug
Halyomorpha halys
823 observations in the last 30 days
96.25% introduced
Box tree moth
Cydalima perspectalis
408 observations in the last 30 days
96.02% introduced
House mouse
Mus musculus
120 observations in the last 30 days
95.87% introduced
Asian ladybeetle
Harmonia axyridis
7,148 observations in the last 30 days
95.53% introducedCommon pheasant
Phasianus colchicus
1,124 observations in the last 30 days
94.83% introducedYak
Bos grunniens
16 observations in the last 30 days
94.81% introduced
Domestic dog
Canis lupus familiaris
493 observations in the last 30 days
93.7% introducedDomestic duck
Anas platyrhynchos domesticus
961 observations in the last 30 days
93.45% introduced
Nutria
Myocastor coypus
517 observations in the last 30 days
88.48% introduced
Domestic goat
Capra hircus
166 observations in the last 30 days
86.9% introduced
Egyptian goose
Alopochen aegyptiaca
1,242 observations in the last 30 days
86.17% introduced
Llama
Lama glama
Five observations in the last 30 days
82.2% introducedEuropean rabbit
Oryctolagus cuniculus
865 observations in the last 30 days
80.06% introduced
European honey bee
Apis mellifera
4,882 observations in the last 30 days
79.48% introduced
Domestic house spider
Tegenaria domestica
180 observations in the last 30 days
77.66% introduced
European paper wasp
Polistes dominula
447 observations in the last 30 days
73.78% introduced
Common pill woodlouse
Armadillidium vulgare
3,498 observations in the last 30 days
73.72% introduced
Arion
Arion species
743 observations in the last 30 days
73.63% introduced
Common earthworm
Lumbricus terrestris
150 observations in the last 30 days
69.78% introduced
Madagascar giant day gecko
Phelsuma grandis
24 observations in the last 30 days
65.92% introducedRock dove
Columba livia
4,670 observations in the last 30 days
62.52% introduced
Indian peafowl
Pavo cristatus
414 observations in the last 30 days
60.27% introduced
Garden snail
Cornu aspersum
2,303 observations in the last 30 days
58.09% introduced
Common green bottle fly
Lucilia sericata
131 observations in the last 30 days
57.98% introduced
Leopard slug
Limax maximus
757 observations in the last 30 days
53.69% introduced
Bathroom moth midge
Clogmia albipunctata
223 observations in the last 30 days
49.11% introduced
Housefly
Musca domestica
40 observations in the last 30 days
46.43% introduced
Eurasian collared dove
Streptopelia decaocto
1,718 observations in the last 30 days
45.68% introduced
Jamaican field cricket
Gryllus assimilis
Seven observations in the last 30 days
43.08% introduced
Common striped woodlouse
Philoscia muscorum
867 observations in the last 30 days
38.88% introducedShore crab
Carcinus maenas
660 observations in the last 30 days
36.92% introduced
European garden spider
Araneus diadematus
337 observations in the last 30 days
36.62% introduced
Superworm
Zophobas atratus
Five observations in the last 30 days
35.93% introduced
Seven-spot ladybird
Coccinella septempunctata
5,562 observations in the last 30 days
35.75% introduced
Domestic guinea pig
Cavia porcellus
Ten observations in the last 30 days
35.08% introduced
Grove snail
Cepaea nemoralis
2,081 observations in the last 30 days
34.78% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
30.3% introducedSickle-bearing bush cricket
Phaneroptera species
164 observations in the last 30 days
28.67% introduced
Buff-tailed bumblebee
Bombus terrestris
635 observations in the last 30 days
28.2% introduced
European hornet
Vespa crabro
1,494 observations in the last 30 days
27.08% introduced
Dromedary
Camelus dromedarius
27 observations in the last 30 days
24.61% introduced
Yellow mealworm beetle
Tenebrio molitor
11 observations in the last 30 days
23.06% introduced
Common crab spider
Xysticus cristatus
34 observations in the last 30 days
21.94% introduced
Mute swan
Cygnus olor
2,353 observations in the last 30 days
21.66% introduced
Crane fly
Tipula species
679 observations in the last 30 days
18.46% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
17.39% introduced
Devil's coach-horse beetle
Ocypus olens
146 observations in the last 30 days
15.02% introduced
Canada goose
Branta canadensis
5,498 observations in the last 30 days
13.9% introduced
Common wasp
Vespula vulgaris
144 observations in the last 30 days
12.24% introduced
Brown-tail moth
Euproctis chrysorrhoea
299 observations in the last 30 days
11.34% introduced
Garden banded snail
Cepaea hortensis
603 observations in the last 30 days
8.18% introduced
Domestic silk moth
Bombyx mori
One observation in the last 30 days
7.14% introduced
Mallard
Anas platyrhynchos
7,037 observations in the last 30 days
5.92% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
1,660 observations in the last 30 days
5.34% introduced
Firebug
Pyrrhocoris apterus
1,554 observations in the last 30 days
4.74% introduced
Monarch butterfly
Danaus plexippus
3,155 observations in the last 30 days
4.73% introduced
Two-spot ladybird
Adalia bipunctata
1,117 observations in the last 30 days
4.3% introduced
Drugstore beetle
Stegobium paniceum
Five observations in the last 30 days
3.23% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Six observations in the last 30 days
2.59% introduced
Flesh fly
Sarcophaga species
23 observations in the last 30 days
2.24% introduced
Desert locust
Schistocerca gregaria
Seven observations in the last 30 days
2.13% introduced
Two-spotted cricket
Gryllus bimaculatus
31 observations in the last 30 days
1.89% introduced
Corn snake
Pantherophis guttatus
197 observations in the last 30 days
1.58% introduced
Great house spider
Eratigena atrica
83 observations in the last 30 days
1.15% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
851 observations in the last 30 days
0.62% introduced
Dubia roach
Blaptica dubia
No observations in the last 30 days
0.62% introduced
Sahara frog
Pelophylax saharicus
29 observations in the last 30 days
0.55% introducedPicnic beetle
Glischrochilus quadrisignatus
92 observations in the last 30 days
0.39% introduced
Bactrian camel
Camelus bactrianus
Ten observations in the last 30 days
0.36% introduced
Forest cockroach
Planuncus tingitanus sensu lato
197 observations in the last 30 days
0.19% introduced
Garden bumblebee
Bombus hortorum
519 observations in the last 30 days
0.11% introduced
Sac spider
Clubiona species
58 observations in the last 30 days
0.11% introduced
Rook
Corvus frugilegus
667 observations in the last 30 days
0.04% introduced
Sand lizard
Lacerta agilis
1,157 observations in the last 30 days
0.04% introduced
Jumping spider
Marpissa muscosa
574 observations in the last 30 days
0.04% introduced