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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
213 observations in the last 30 days
100% introduced
Chicken
Gallus gallus domesticus
340 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,635 observations in the last 30 days
99.98% introduced
Brown anole
Anolis sagrei
1,428 observations in the last 30 days
99.52% introduced
Giant African land snail
Lissachatina fulica
366 observations in the last 30 days
99.45% introduced
European fallow deer
Dama dama
161 observations in the last 30 days
99.4% introduced
Domestic sheep
Ovis aries
99 observations in the last 30 days
97.94% introduced
Cattle
Bos taurus
120 observations in the last 30 days
96.77% introduced
Asian ladybeetle
Harmonia axyridis
6,047 observations in the last 30 days
96.23% introduced
Box tree moth
Cydalima perspectalis
326 observations in the last 30 days
96.11% introduced
Brown marmorated stink bug
Halyomorpha halys
2,101 observations in the last 30 days
96% introduced
House mouse
Mus musculus
115 observations in the last 30 days
95.95% introducedCommon pheasant
Phasianus colchicus
839 observations in the last 30 days
94.99% introduced
Domestic dog
Canis lupus familiaris
612 observations in the last 30 days
94.49% introducedDomestic duck
Anas platyrhynchos domesticus
788 observations in the last 30 days
94.18% introducedYak
Bos grunniens
Nine observations in the last 30 days
92.57% introduced
Domestic goat
Capra hircus
119 observations in the last 30 days
88.39% introduced
Nutria
Myocastor coypus
476 observations in the last 30 days
88.07% introduced
Egyptian goose
Alopochen aegyptiaca
1,013 observations in the last 30 days
85.62% introduced
Llama
Lama glama
Seven observations in the last 30 days
82.31% introducedEuropean rabbit
Oryctolagus cuniculus
506 observations in the last 30 days
80.96% introduced
European honey bee
Apis mellifera
4,844 observations in the last 30 days
79.43% introduced
Arion
Arion species
371 observations in the last 30 days
77.91% introduced
Domestic house spider
Tegenaria domestica
34 observations in the last 30 days
76.36% introduced
European paper wasp
Polistes dominula
334 observations in the last 30 days
74.72% introduced
Common pill woodlouse
Armadillidium vulgare
1,390 observations in the last 30 days
74.7% introduced
Common earthworm
Lumbricus terrestris
62 observations in the last 30 days
69.45% introduced
Madagascar giant day gecko
Phelsuma grandis
69 observations in the last 30 days
66.97% introducedRock dove
Columba livia
4,410 observations in the last 30 days
64.35% introduced
Indian peafowl
Pavo cristatus
428 observations in the last 30 days
59.73% introduced
Garden snail
Cornu aspersum
1,826 observations in the last 30 days
58.98% introduced
Leopard slug
Limax maximus
594 observations in the last 30 days
57.49% introduced
Common green bottle fly
Lucilia sericata
176 observations in the last 30 days
56.92% introduced
Bathroom moth midge
Clogmia albipunctata
357 observations in the last 30 days
48.37% introduced
Jamaican field cricket
Gryllus assimilis
Six observations in the last 30 days
47.14% introduced
Housefly
Musca domestica
84 observations in the last 30 days
45.78% introduced
Eurasian collared dove
Streptopelia decaocto
1,285 observations in the last 30 days
44.67% introduced
Common striped woodlouse
Philoscia muscorum
444 observations in the last 30 days
42.42% introducedShore crab
Carcinus maenas
434 observations in the last 30 days
42.06% introduced
Grove snail
Cepaea nemoralis
816 observations in the last 30 days
37.9% introduced
Seven-spot ladybird
Coccinella septempunctata
2,065 observations in the last 30 days
36.06% introduced
Superworm
Zophobas atratus
12 observations in the last 30 days
34.68% introduced
Domestic guinea pig
Cavia porcellus
12 observations in the last 30 days
34.13% introduced
European garden spider
Araneus diadematus
1,991 observations in the last 30 days
33.8% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
28.38% introducedSickle-bearing bush cricket
Phaneroptera species
464 observations in the last 30 days
28.17% introduced
Dromedary
Camelus dromedarius
53 observations in the last 30 days
27.94% introduced
European hornet
Vespa crabro
1,324 observations in the last 30 days
26.18% introduced
Buff-tailed bumblebee
Bombus terrestris
338 observations in the last 30 days
25.06% introduced
Common crab spider
Xysticus cristatus
13 observations in the last 30 days
22.01% introduced
Mute swan
Cygnus olor
1,848 observations in the last 30 days
21.76% introduced
Crane fly
Tipula species
285 observations in the last 30 days
19.54% introduced
Yellow mealworm beetle
Tenebrio molitor
Eight observations in the last 30 days
19.29% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
16% introduced
Canada goose
Branta canadensis
3,026 observations in the last 30 days
14.18% introduced
Devil's coach-horse beetle
Ocypus olens
369 observations in the last 30 days
14.15% introduced
Brown-tail moth
Euproctis chrysorrhoea
Three observations in the last 30 days
10.06% introduced
Common wasp
Vespula vulgaris
668 observations in the last 30 days
9.72% introduced
Garden banded snail
Cepaea hortensis
178 observations in the last 30 days
8.91% introduced
Domestic silk moth
Bombyx mori
Two observations in the last 30 days
7.81% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
193 observations in the last 30 days
5.46% introduced
Mallard
Anas platyrhynchos
5,384 observations in the last 30 days
5.19% introduced
Firebug
Pyrrhocoris apterus
1,010 observations in the last 30 days
5.08% introduced
Two-spot ladybird
Adalia bipunctata
286 observations in the last 30 days
4.03% introduced
Monarch butterfly
Danaus plexippus
5,537 observations in the last 30 days
3.83% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
14 observations in the last 30 days
3.03% introduced
Drugstore beetle
Stegobium paniceum
Four observations in the last 30 days
2.93% introduced
Desert locust
Schistocerca gregaria
Six observations in the last 30 days
2.45% introduced
Two-spotted cricket
Gryllus bimaculatus
314 observations in the last 30 days
1.89% introduced
Flesh fly
Sarcophaga species
23 observations in the last 30 days
1.59% introduced
Corn snake
Pantherophis guttatus
115 observations in the last 30 days
1.48% introduced
Great house spider
Eratigena atrica
212 observations in the last 30 days
1.14% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
852 observations in the last 30 days
0.55% introduced
Dubia roach
Blaptica dubia
Three observations in the last 30 days
0.53% introduced
Sahara frog
Pelophylax saharicus
32 observations in the last 30 days
0.48% introduced
Forest cockroach
Planuncus tingitanus sensu lato
141 observations in the last 30 days
0.35% introducedPicnic beetle
Glischrochilus quadrisignatus
Six observations in the last 30 days
0.31% introduced
Bactrian camel
Camelus bactrianus
Six observations in the last 30 days
0.3% introduced
Garden bumblebee
Bombus hortorum
Eight observations in the last 30 days
0.11% introduced
Sac spider
Clubiona species
19 observations in the last 30 days
0.1% introduced
Jumping spider
Marpissa muscosa
38 observations in the last 30 days
0.06% introduced
Rook
Corvus frugilegus
1,033 observations in the last 30 days
0.05% introduced
Sand lizard
Lacerta agilis
48 observations in the last 30 days
0.05% introduced