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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
179 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,185 observations in the last 30 days
99.99% introduced
Cattle
Bos taurus
119 observations in the last 30 days
99.86% introduced
Giant African land snail
Lissachatina fulica
292 observations in the last 30 days
99.51% introduced
European fallow deer
Dama dama
104 observations in the last 30 days
99.41% introduced
Brown anole
Anolis sagrei
1,368 observations in the last 30 days
99.02% introduced
Asian ladybeetle
Harmonia axyridis
2,454 observations in the last 30 days
96.72% introduced
Domestic sheep
Ovis aries
70 observations in the last 30 days
96.54% introduced
Brown marmorated stink bug
Halyomorpha halys
808 observations in the last 30 days
96.18% introduced
House mouse
Mus musculus
54 observations in the last 30 days
95.87% introduced
Box tree moth
Cydalima perspectalis
Nine observations in the last 30 days
94.68% introduced
Domestic dog
Canis lupus familiaris
517 observations in the last 30 days
92.59% introduced
Nutria
Myocastor coypus
392 observations in the last 30 days
89.1% introduced
Llama
Lama glama
12 observations in the last 30 days
85.06% introduced
Egyptian goose
Alopochen aegyptiaca
970 observations in the last 30 days
83.47% introduced
Domestic goat
Capra hircus
133 observations in the last 30 days
83.47% introduced
European honey bee
Apis mellifera
4,054 observations in the last 30 days
81.69% introduced
European paper wasp
Polistes dominula
449 observations in the last 30 days
76.95% introduced
Domestic house spider
Tegenaria domestica
36 observations in the last 30 days
73.85% introduced
Arion
Arion species
112 observations in the last 30 days
70.32% introduced
Common earthworm
Lumbricus terrestris
52 observations in the last 30 days
69.81% introduced
Common pill woodlouse
Armadillidium vulgare
1,549 observations in the last 30 days
64.2% introduced
Indian peafowl
Pavo cristatus
267 observations in the last 30 days
63.07% introduced
Madagascar giant day gecko
Phelsuma grandis
12 observations in the last 30 days
62.58% introduced
Garden snail
Cornu aspersum
1,564 observations in the last 30 days
58.16% introduced
Bathroom moth midge
Clogmia albipunctata
180 observations in the last 30 days
55.32% introduced
Eurasian collared dove
Streptopelia decaocto
1,522 observations in the last 30 days
50.4% introduced
Leopard slug
Limax maximus
292 observations in the last 30 days
49.4% introduced
Common green bottle fly
Lucilia sericata
35 observations in the last 30 days
48.35% introduced
Housefly
Musca domestica
51 observations in the last 30 days
47.77% introduced
Jamaican field cricket
Gryllus assimilis
Four observations in the last 30 days
46.15% introduced
Domestic guinea pig
Cavia porcellus
Seven observations in the last 30 days
45.16% introduced
Seven-spot ladybird
Coccinella septempunctata
2,590 observations in the last 30 days
41.07% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
40% introduced
European garden spider
Araneus diadematus
34 observations in the last 30 days
36.91% introduced
Grove snail
Cepaea nemoralis
681 observations in the last 30 days
33.84% introduced
European hornet
Vespa crabro
76 observations in the last 30 days
32.06% introduced
Common striped woodlouse
Philoscia muscorum
319 observations in the last 30 days
28.8% introduced
Buff-tailed bumblebee
Bombus terrestris
747 observations in the last 30 days
27.34% introduced
Yellow mealworm beetle
Tenebrio molitor
Six observations in the last 30 days
25% introduced
Dromedary
Camelus dromedarius
12 observations in the last 30 days
23.45% introduced
Mute swan
Cygnus olor
1,825 observations in the last 30 days
23.04% introduced
Brown-tail moth
Euproctis chrysorrhoea
14 observations in the last 30 days
20.7% introduced
Common crab spider
Xysticus cristatus
21 observations in the last 30 days
18.04% introduced
Sickle-bearing bush cricket
Phaneroptera species
16 observations in the last 30 days
16.01% introduced
Crane fly
Tipula species
111 observations in the last 30 days
14.87% introduced
Devil's coach-horse beetle
Ocypus olens
22 observations in the last 30 days
14.37% introduced
Canada goose
Branta canadensis
4,858 observations in the last 30 days
12.48% introduced
Common wasp
Vespula vulgaris
256 observations in the last 30 days
12.15% introduced
Mallard
Anas platyrhynchos
6,799 observations in the last 30 days
10.32% introduced
Garden banded snail
Cepaea hortensis
103 observations in the last 30 days
6.84% introduced
Domestic silk moth
Bombyx mori
Two observations in the last 30 days
6.06% introduced
Roman snail
Helix pomatia
384 observations in the last 30 days
5.24% introduced
Monarch butterfly
Danaus plexippus
1,203 observations in the last 30 days
5.16% introduced
Firebug
Pyrrhocoris apterus
1,575 observations in the last 30 days
5.06% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
5% introduced
Alpaca
Vicugna pacos
Eight observations in the last 30 days
4.84% introduced
Two-spot ladybird
Adalia bipunctata
274 observations in the last 30 days
3.85% introduced
Drugstore beetle
Stegobium paniceum
Nine observations in the last 30 days
3.09% introduced
Two-spotted cricket
Gryllus bimaculatus
36 observations in the last 30 days
2.76% introduced
Desert locust
Schistocerca gregaria
19 observations in the last 30 days
1.68% introduced
Corn snake
Pantherophis guttatus
109 observations in the last 30 days
1.55% introduced
Flesh fly
Sarcophaga species
Five observations in the last 30 days
1.43% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
323 observations in the last 30 days
0.84% introduced
Great house spider
Eratigena atrica
52 observations in the last 30 days
0.82% introduced
Sahara frog
Pelophylax saharicus
19 observations in the last 30 days
0.68% introducedPicnic beetle
Glischrochilus quadrisignatus
Six observations in the last 30 days
0.28% introduced
Garden bumblebee
Bombus hortorum
103 observations in the last 30 days
0.18% introduced
Rook
Corvus frugilegus
1,213 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
154 observations in the last 30 days
0.04% introduced