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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
390 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
292 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,453 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
289 observations in the last 30 days
99.58% introduced
Brown anole
Anolis sagrei
1,947 observations in the last 30 days
99.45% introduced
European fallow deer
Dama dama
49 observations in the last 30 days
99.41% introduced
Domestic sheep
Ovis aries
87 observations in the last 30 days
97.58% introduced
Cattle
Bos taurus
164 observations in the last 30 days
97.35% introduced
Brown marmorated stink bug
Halyomorpha halys
772 observations in the last 30 days
96.24% introduced
Box tree moth
Cydalima perspectalis
619 observations in the last 30 days
96.06% introduced
House mouse
Mus musculus
107 observations in the last 30 days
95.91% introduced
Asian ladybeetle
Harmonia axyridis
7,333 observations in the last 30 days
95.6% introducedYak
Bos grunniens
17 observations in the last 30 days
94.98% introducedCommon pheasant
Phasianus colchicus
990 observations in the last 30 days
94.82% introduced
Domestic dog
Canis lupus familiaris
467 observations in the last 30 days
93.75% introducedDomestic duck
Anas platyrhynchos domesticus
958 observations in the last 30 days
93.57% introduced
Nutria
Myocastor coypus
501 observations in the last 30 days
88.57% introduced
Domestic goat
Capra hircus
166 observations in the last 30 days
87.04% introduced
Egyptian goose
Alopochen aegyptiaca
1,213 observations in the last 30 days
86.12% introduced
Llama
Lama glama
Four observations in the last 30 days
82.28% introducedEuropean rabbit
Oryctolagus cuniculus
910 observations in the last 30 days
80.07% introduced
European honey bee
Apis mellifera
5,019 observations in the last 30 days
79.13% introduced
Domestic house spider
Tegenaria domestica
198 observations in the last 30 days
77.96% introduced
Arion
Arion species
797 observations in the last 30 days
74.07% introduced
European paper wasp
Polistes dominula
565 observations in the last 30 days
73.84% introduced
Common pill woodlouse
Armadillidium vulgare
3,507 observations in the last 30 days
73.69% introduced
Common earthworm
Lumbricus terrestris
121 observations in the last 30 days
69.53% introduced
Madagascar giant day gecko
Phelsuma grandis
32 observations in the last 30 days
66.28% introducedRock dove
Columba livia
4,435 observations in the last 30 days
62.6% introduced
Indian peafowl
Pavo cristatus
454 observations in the last 30 days
60.24% introduced
Garden snail
Cornu aspersum
2,165 observations in the last 30 days
58.23% introduced
Common green bottle fly
Lucilia sericata
113 observations in the last 30 days
57.51% introduced
Leopard slug
Limax maximus
758 observations in the last 30 days
53.97% introduced
Bathroom moth midge
Clogmia albipunctata
343 observations in the last 30 days
49.07% introduced
Housefly
Musca domestica
53 observations in the last 30 days
46.25% introduced
Eurasian collared dove
Streptopelia decaocto
1,684 observations in the last 30 days
45.5% introduced
Jamaican field cricket
Gryllus assimilis
Seven observations in the last 30 days
43.08% introduced
Common striped woodlouse
Philoscia muscorum
790 observations in the last 30 days
38.88% introducedShore crab
Carcinus maenas
758 observations in the last 30 days
38.12% introduced
European garden spider
Araneus diadematus
428 observations in the last 30 days
36.48% introduced
Superworm
Zophobas atratus
Five observations in the last 30 days
35.93% introduced
Seven-spot ladybird
Coccinella septempunctata
5,282 observations in the last 30 days
35.69% introduced
Domestic guinea pig
Cavia porcellus
Seven observations in the last 30 days
35.08% introduced
Grove snail
Cepaea nemoralis
1,858 observations in the last 30 days
34.85% introduced
Common leopard gecko
Eublepharis macularius
Four observations in the last 30 days
30.3% introducedSickle-bearing bush cricket
Phaneroptera species
191 observations in the last 30 days
28.75% introduced
Buff-tailed bumblebee
Bombus terrestris
693 observations in the last 30 days
27.74% introduced
European hornet
Vespa crabro
1,417 observations in the last 30 days
26.77% introduced
Dromedary
Camelus dromedarius
28 observations in the last 30 days
24.94% introduced
Yellow mealworm beetle
Tenebrio molitor
15 observations in the last 30 days
22.99% introduced
Common crab spider
Xysticus cristatus
32 observations in the last 30 days
21.98% introduced
Mute swan
Cygnus olor
2,212 observations in the last 30 days
21.67% introduced
Crane fly
Tipula species
607 observations in the last 30 days
18.22% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
17.39% introduced
Devil's coach-horse beetle
Ocypus olens
171 observations in the last 30 days
15.01% introduced
Canada goose
Branta canadensis
4,620 observations in the last 30 days
13.91% introduced
Common wasp
Vespula vulgaris
109 observations in the last 30 days
12.21% introduced
Brown-tail moth
Euproctis chrysorrhoea
166 observations in the last 30 days
11.22% introduced
Garden banded snail
Cepaea hortensis
555 observations in the last 30 days
8.22% introduced
Domestic silk moth
Bombyx mori
No observations in the last 30 days
7.14% introduced
Mallard
Anas platyrhynchos
6,502 observations in the last 30 days
5.86% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
1,450 observations in the last 30 days
5.35% introduced
Firebug
Pyrrhocoris apterus
1,537 observations in the last 30 days
4.72% introduced
Monarch butterfly
Danaus plexippus
3,814 observations in the last 30 days
4.72% introduced
Two-spot ladybird
Adalia bipunctata
1,164 observations in the last 30 days
4.19% introduced
Drugstore beetle
Stegobium paniceum
Six observations in the last 30 days
3.21% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Six observations in the last 30 days
2.56% introduced
Flesh fly
Sarcophaga species
26 observations in the last 30 days
2.21% introduced
Desert locust
Schistocerca gregaria
Ten observations in the last 30 days
2.11% introduced
Two-spotted cricket
Gryllus bimaculatus
39 observations in the last 30 days
1.9% introduced
Corn snake
Pantherophis guttatus
156 observations in the last 30 days
1.56% introduced
Great house spider
Eratigena atrica
71 observations in the last 30 days
1.14% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
1,221 observations in the last 30 days
0.61% introduced
Dubia roach
Blaptica dubia
One observation in the last 30 days
0.6% introduced
Sahara frog
Pelophylax saharicus
27 observations in the last 30 days
0.54% introducedPicnic beetle
Glischrochilus quadrisignatus
71 observations in the last 30 days
0.38% introduced
Bactrian camel
Camelus bactrianus
12 observations in the last 30 days
0.36% introduced
Forest cockroach
Planuncus tingitanus sensu lato
302 observations in the last 30 days
0.18% introduced
Sac spider
Clubiona species
40 observations in the last 30 days
0.11% introduced
Garden bumblebee
Bombus hortorum
553 observations in the last 30 days
0.1% introduced
Jumping spider
Marpissa muscosa
610 observations in the last 30 days
0.05% introduced
Rook
Corvus frugilegus
584 observations in the last 30 days
0.04% introduced
Sand lizard
Lacerta agilis
1,160 observations in the last 30 days
0.04% introduced