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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.
Chicken
Gallus gallus domesticus
362 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
205 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,362 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
318 observations in the last 30 days
99.6% introduced
Brown anole
Anolis sagrei
1,513 observations in the last 30 days
99.47% introduced
European fallow deer
Dama dama
66 observations in the last 30 days
99.43% introduced
Domestic sheep
Ovis aries
78 observations in the last 30 days
97.67% introduced
Cattle
Bos taurus
120 observations in the last 30 days
97.27% introduced
Box tree moth
Cydalima perspectalis
1,572 observations in the last 30 days
96.27% introduced
Brown marmorated stink bug
Halyomorpha halys
1,083 observations in the last 30 days
96.21% introduced
House mouse
Mus musculus
55 observations in the last 30 days
95.91% introduced
Asian ladybeetle
Harmonia axyridis
5,856 observations in the last 30 days
95.75% introducedCommon pheasant
Phasianus colchicus
736 observations in the last 30 days
94.73% introduced
Domestic dog
Canis lupus familiaris
403 observations in the last 30 days
93.9% introducedDomestic duck
Anas platyrhynchos domesticus
830 observations in the last 30 days
93.71% introducedYak
Bos grunniens
16 observations in the last 30 days
93.22% introduced
Nutria
Myocastor coypus
408 observations in the last 30 days
88.51% introduced
Domestic goat
Capra hircus
147 observations in the last 30 days
87.5% introduced
Egyptian goose
Alopochen aegyptiaca
1,015 observations in the last 30 days
86.05% introduced
Llama
Lama glama
Three observations in the last 30 days
82.45% introducedEuropean rabbit
Oryctolagus cuniculus
720 observations in the last 30 days
79.84% introduced
European honey bee
Apis mellifera
5,569 observations in the last 30 days
78.71% introduced
Domestic house spider
Tegenaria domestica
104 observations in the last 30 days
77.22% introduced
Arion
Arion species
838 observations in the last 30 days
75.55% introduced
Common pill woodlouse
Armadillidium vulgare
2,448 observations in the last 30 days
73.96% introduced
European paper wasp
Polistes dominula
903 observations in the last 30 days
73.61% introduced
Common earthworm
Lumbricus terrestris
42 observations in the last 30 days
69.28% introduced
Madagascar giant day gecko
Phelsuma grandis
41 observations in the last 30 days
66.67% introducedRock dove
Columba livia
4,281 observations in the last 30 days
63.18% introduced
Indian peafowl
Pavo cristatus
412 observations in the last 30 days
60.22% introduced
Garden snail
Cornu aspersum
1,438 observations in the last 30 days
58.33% introduced
Common green bottle fly
Lucilia sericata
431 observations in the last 30 days
58.29% introduced
Leopard slug
Limax maximus
813 observations in the last 30 days
54.77% introduced
Bathroom moth midge
Clogmia albipunctata
323 observations in the last 30 days
49.12% introduced
Housefly
Musca domestica
84 observations in the last 30 days
46.1% introduced
Eurasian collared dove
Streptopelia decaocto
1,540 observations in the last 30 days
45.11% introduced
Jamaican field cricket
Gryllus assimilis
Six observations in the last 30 days
43.94% introduced
Common striped woodlouse
Philoscia muscorum
461 observations in the last 30 days
40.19% introducedShore crab
Carcinus maenas
370 observations in the last 30 days
38.89% introduced
Superworm
Zophobas atratus
Seven observations in the last 30 days
36.54% introduced
Grove snail
Cepaea nemoralis
1,577 observations in the last 30 days
35.83% introduced
Seven-spot ladybird
Coccinella septempunctata
4,214 observations in the last 30 days
35.81% introduced
European garden spider
Araneus diadematus
1,354 observations in the last 30 days
35.59% introduced
Domestic guinea pig
Cavia porcellus
Nine observations in the last 30 days
33.72% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
30.88% introducedSickle-bearing bush cricket
Phaneroptera species
328 observations in the last 30 days
29.44% introduced
European hornet
Vespa crabro
919 observations in the last 30 days
26.49% introduced
Buff-tailed bumblebee
Bombus terrestris
893 observations in the last 30 days
26.11% introduced
Dromedary
Camelus dromedarius
18 observations in the last 30 days
25.84% introduced
Common crab spider
Xysticus cristatus
Nine observations in the last 30 days
22.02% introduced
Mute swan
Cygnus olor
1,754 observations in the last 30 days
21.61% introduced
Yellow mealworm beetle
Tenebrio molitor
77 observations in the last 30 days
21.08% introduced
Crane fly
Tipula species
165 observations in the last 30 days
18.25% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
16% introduced
Devil's coach-horse beetle
Ocypus olens
158 observations in the last 30 days
14.98% introduced
Canada goose
Branta canadensis
3,216 observations in the last 30 days
14.05% introduced
Common wasp
Vespula vulgaris
160 observations in the last 30 days
11.95% introduced
Brown-tail moth
Euproctis chrysorrhoea
277 observations in the last 30 days
10.41% introduced
Garden banded snail
Cepaea hortensis
337 observations in the last 30 days
8.37% introduced
Domestic silk moth
Bombyx mori
No observations in the last 30 days
7.02% introduced
Mallard
Anas platyrhynchos
4,957 observations in the last 30 days
5.69% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
938 observations in the last 30 days
5.48% introduced
Firebug
Pyrrhocoris apterus
1,712 observations in the last 30 days
4.86% introduced
Monarch butterfly
Danaus plexippus
6,296 observations in the last 30 days
4.58% introduced
Two-spot ladybird
Adalia bipunctata
560 observations in the last 30 days
4.06% introduced
Drugstore beetle
Stegobium paniceum
12 observations in the last 30 days
3.12% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Five observations in the last 30 days
2.56% introduced
Desert locust
Schistocerca gregaria
Two observations in the last 30 days
2.09% introduced
Flesh fly
Sarcophaga species
30 observations in the last 30 days
1.92% introduced
Two-spotted cricket
Gryllus bimaculatus
49 observations in the last 30 days
1.9% introduced
Corn snake
Pantherophis guttatus
123 observations in the last 30 days
1.56% introduced
Great house spider
Eratigena atrica
92 observations in the last 30 days
1.2% introduced
Dubia roach
Blaptica dubia
One observation in the last 30 days
0.6% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
1,935 observations in the last 30 days
0.57% introduced
Sahara frog
Pelophylax saharicus
Six observations in the last 30 days
0.53% introduced
Bactrian camel
Camelus bactrianus
Ten observations in the last 30 days
0.34% introducedPicnic beetle
Glischrochilus quadrisignatus
97 observations in the last 30 days
0.34% introduced
Forest cockroach
Planuncus tingitanus sensu lato
533 observations in the last 30 days
0.24% introduced
Sac spider
Clubiona species
19 observations in the last 30 days
0.1% introduced
Garden bumblebee
Bombus hortorum
353 observations in the last 30 days
0.09% introduced
Jumping spider
Marpissa muscosa
299 observations in the last 30 days
0.07% introduced
Sand lizard
Lacerta agilis
682 observations in the last 30 days
0.05% introduced
Rook
Corvus frugilegus
564 observations in the last 30 days
0.04% introduced