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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
242 observations in the last 30 days
100% introduced
Chicken
Gallus gallus domesticus
378 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,493 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
358 observations in the last 30 days
99.6% introduced
Brown anole
Anolis sagrei
1,666 observations in the last 30 days
99.48% introduced
European fallow deer
Dama dama
64 observations in the last 30 days
99.39% introduced
Domestic sheep
Ovis aries
77 observations in the last 30 days
97.7% introduced
Cattle
Bos taurus
134 observations in the last 30 days
97.19% introduced
Box tree moth
Cydalima perspectalis
1,178 observations in the last 30 days
96.26% introduced
Brown marmorated stink bug
Halyomorpha halys
1,313 observations in the last 30 days
96.17% introduced
House mouse
Mus musculus
69 observations in the last 30 days
95.94% introduced
Asian ladybeetle
Harmonia axyridis
5,325 observations in the last 30 days
95.82% introducedCommon pheasant
Phasianus colchicus
750 observations in the last 30 days
94.81% introduced
Domestic dog
Canis lupus familiaris
446 observations in the last 30 days
94% introducedDomestic duck
Anas platyrhynchos domesticus
891 observations in the last 30 days
93.86% introducedYak
Bos grunniens
Eight observations in the last 30 days
93.39% introduced
Nutria
Myocastor coypus
437 observations in the last 30 days
88.48% introduced
Domestic goat
Capra hircus
153 observations in the last 30 days
87.66% introduced
Egyptian goose
Alopochen aegyptiaca
1,056 observations in the last 30 days
86.01% introduced
Llama
Lama glama
Four observations in the last 30 days
82.39% introducedEuropean rabbit
Oryctolagus cuniculus
724 observations in the last 30 days
79.72% introduced
European honey bee
Apis mellifera
5,965 observations in the last 30 days
78.6% introduced
Domestic house spider
Tegenaria domestica
111 observations in the last 30 days
77.2% introduced
Arion
Arion species
997 observations in the last 30 days
76.31% introduced
Common pill woodlouse
Armadillidium vulgare
2,030 observations in the last 30 days
74.08% introduced
European paper wasp
Polistes dominula
933 observations in the last 30 days
73.73% introduced
Common earthworm
Lumbricus terrestris
25 observations in the last 30 days
69.23% introduced
Madagascar giant day gecko
Phelsuma grandis
36 observations in the last 30 days
66.91% introducedRock dove
Columba livia
4,522 observations in the last 30 days
63.25% introduced
Indian peafowl
Pavo cristatus
429 observations in the last 30 days
60.21% introduced
Garden snail
Cornu aspersum
1,292 observations in the last 30 days
58.33% introduced
Common green bottle fly
Lucilia sericata
320 observations in the last 30 days
55.91% introduced
Leopard slug
Limax maximus
860 observations in the last 30 days
55.34% introduced
Bathroom moth midge
Clogmia albipunctata
402 observations in the last 30 days
48.93% introduced
Housefly
Musca domestica
84 observations in the last 30 days
45.92% introduced
Eurasian collared dove
Streptopelia decaocto
1,676 observations in the last 30 days
45.06% introduced
Jamaican field cricket
Gryllus assimilis
Six observations in the last 30 days
43.94% introduced
Common striped woodlouse
Philoscia muscorum
394 observations in the last 30 days
40.67% introducedShore crab
Carcinus maenas
428 observations in the last 30 days
39.2% introduced
Grove snail
Cepaea nemoralis
1,379 observations in the last 30 days
36.44% introduced
Seven-spot ladybird
Coccinella septempunctata
3,406 observations in the last 30 days
35.85% introduced
European garden spider
Araneus diadematus
2,178 observations in the last 30 days
35.02% introduced
Superworm
Zophobas atratus
23 observations in the last 30 days
34.41% introduced
Domestic guinea pig
Cavia porcellus
Six observations in the last 30 days
33.72% introduced
Common leopard gecko
Eublepharis macularius
Four observations in the last 30 days
30.43% introducedSickle-bearing bush cricket
Phaneroptera species
447 observations in the last 30 days
29.04% introduced
European hornet
Vespa crabro
1,228 observations in the last 30 days
26.37% introduced
Dromedary
Camelus dromedarius
12 observations in the last 30 days
25.96% introduced
Buff-tailed bumblebee
Bombus terrestris
1,078 observations in the last 30 days
25.39% introduced
Common crab spider
Xysticus cristatus
Eight observations in the last 30 days
21.84% introduced
Mute swan
Cygnus olor
1,867 observations in the last 30 days
21.62% introduced
Yellow mealworm beetle
Tenebrio molitor
74 observations in the last 30 days
19.97% introduced
Crane fly
Tipula species
117 observations in the last 30 days
18.28% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
16% introduced
Devil's coach-horse beetle
Ocypus olens
83 observations in the last 30 days
14.92% introduced
Canada goose
Branta canadensis
3,506 observations in the last 30 days
14.14% introduced
Common wasp
Vespula vulgaris
215 observations in the last 30 days
11.76% introduced
Brown-tail moth
Euproctis chrysorrhoea
93 observations in the last 30 days
10.39% introduced
Garden banded snail
Cepaea hortensis
302 observations in the last 30 days
8.53% introduced
Domestic silk moth
Bombyx mori
No observations in the last 30 days
7.02% introduced
Mallard
Anas platyrhynchos
5,286 observations in the last 30 days
5.6% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
925 observations in the last 30 days
5.53% introduced
Firebug
Pyrrhocoris apterus
1,851 observations in the last 30 days
4.98% introduced
Monarch butterfly
Danaus plexippus
8,832 observations in the last 30 days
4.43% introduced
Two-spot ladybird
Adalia bipunctata
418 observations in the last 30 days
4.03% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Six observations in the last 30 days
3.39% introduced
Drugstore beetle
Stegobium paniceum
11 observations in the last 30 days
3.1% introduced
Desert locust
Schistocerca gregaria
Six observations in the last 30 days
2.07% introduced
Flesh fly
Sarcophaga species
25 observations in the last 30 days
1.87% introduced
Two-spotted cricket
Gryllus bimaculatus
67 observations in the last 30 days
1.87% introduced
Corn snake
Pantherophis guttatus
107 observations in the last 30 days
1.54% introduced
Great house spider
Eratigena atrica
129 observations in the last 30 days
1.24% introduced
Dubia roach
Blaptica dubia
Two observations in the last 30 days
0.58% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
2,238 observations in the last 30 days
0.53% introduced
Sahara frog
Pelophylax saharicus
Nine observations in the last 30 days
0.52% introduced
Forest cockroach
Planuncus tingitanus sensu lato
550 observations in the last 30 days
0.34% introducedPicnic beetle
Glischrochilus quadrisignatus
62 observations in the last 30 days
0.34% introduced
Bactrian camel
Camelus bactrianus
Six observations in the last 30 days
0.33% introduced
Garden bumblebee
Bombus hortorum
314 observations in the last 30 days
0.11% introduced
Sac spider
Clubiona species
25 observations in the last 30 days
0.1% introduced
Jumping spider
Marpissa muscosa
349 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
796 observations in the last 30 days
0.05% introduced
Rook
Corvus frugilegus
643 observations in the last 30 days
0.04% introduced