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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
247 observations in the last 30 days
100% introduced
Chicken
Gallus gallus domesticus
308 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,499 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
407 observations in the last 30 days
99.52% introduced
Brown anole
Anolis sagrei
1,626 observations in the last 30 days
99.5% introduced
European fallow deer
Dama dama
99 observations in the last 30 days
99.35% introduced
Domestic sheep
Ovis aries
75 observations in the last 30 days
97.8% introduced
Cattle
Bos taurus
124 observations in the last 30 days
96.83% introduced
Box tree moth
Cydalima perspectalis
1,820 observations in the last 30 days
96.36% introduced
Brown marmorated stink bug
Halyomorpha halys
1,394 observations in the last 30 days
96.1% introduced
Asian ladybeetle
Harmonia axyridis
6,181 observations in the last 30 days
96.01% introduced
House mouse
Mus musculus
89 observations in the last 30 days
95.98% introducedCommon pheasant
Phasianus colchicus
787 observations in the last 30 days
94.96% introduced
Domestic dog
Canis lupus familiaris
503 observations in the last 30 days
94.19% introducedDomestic duck
Anas platyrhynchos domesticus
811 observations in the last 30 days
94.09% introducedYak
Bos grunniens
12 observations in the last 30 days
92.28% introduced
Nutria
Myocastor coypus
564 observations in the last 30 days
88.42% introduced
Domestic goat
Capra hircus
155 observations in the last 30 days
88.07% introduced
Egyptian goose
Alopochen aegyptiaca
991 observations in the last 30 days
85.77% introduced
Llama
Lama glama
Six observations in the last 30 days
82.14% introducedEuropean rabbit
Oryctolagus cuniculus
619 observations in the last 30 days
80.1% introduced
European honey bee
Apis mellifera
6,603 observations in the last 30 days
78.95% introduced
Arion
Arion species
1,024 observations in the last 30 days
78% introduced
Domestic house spider
Tegenaria domestica
47 observations in the last 30 days
76.83% introduced
Common pill woodlouse
Armadillidium vulgare
2,112 observations in the last 30 days
74.53% introduced
European paper wasp
Polistes dominula
872 observations in the last 30 days
74.35% introduced
Common earthworm
Lumbricus terrestris
50 observations in the last 30 days
69.44% introduced
Madagascar giant day gecko
Phelsuma grandis
64 observations in the last 30 days
68.87% introducedRock dove
Columba livia
4,196 observations in the last 30 days
63.73% introduced
Indian peafowl
Pavo cristatus
432 observations in the last 30 days
60.02% introduced
Garden snail
Cornu aspersum
1,706 observations in the last 30 days
58.56% introduced
Common green bottle fly
Lucilia sericata
395 observations in the last 30 days
56.96% introduced
Leopard slug
Limax maximus
1,047 observations in the last 30 days
56.91% introduced
Bathroom moth midge
Clogmia albipunctata
414 observations in the last 30 days
48.86% introduced
Housefly
Musca domestica
82 observations in the last 30 days
45.62% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
44.78% introduced
Eurasian collared dove
Streptopelia decaocto
1,552 observations in the last 30 days
44.72% introduced
Common striped woodlouse
Philoscia muscorum
494 observations in the last 30 days
42.26% introducedShore crab
Carcinus maenas
422 observations in the last 30 days
41.02% introduced
Grove snail
Cepaea nemoralis
1,641 observations in the last 30 days
37.41% introduced
Seven-spot ladybird
Coccinella septempunctata
2,578 observations in the last 30 days
36.05% introduced
Superworm
Zophobas atratus
Ten observations in the last 30 days
34.76% introduced
Domestic guinea pig
Cavia porcellus
Nine observations in the last 30 days
33.45% introduced
European garden spider
Araneus diadematus
3,827 observations in the last 30 days
33.39% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
29.58% introducedSickle-bearing bush cricket
Phaneroptera species
583 observations in the last 30 days
28.41% introduced
Dromedary
Camelus dromedarius
23 observations in the last 30 days
28% introduced
European hornet
Vespa crabro
2,391 observations in the last 30 days
26.02% introduced
Buff-tailed bumblebee
Bombus terrestris
421 observations in the last 30 days
24.74% introduced
Common crab spider
Xysticus cristatus
Eight observations in the last 30 days
22.27% introduced
Mute swan
Cygnus olor
1,801 observations in the last 30 days
21.61% introduced
Yellow mealworm beetle
Tenebrio molitor
17 observations in the last 30 days
19.57% introduced
Crane fly
Tipula species
531 observations in the last 30 days
18.47% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
16% introduced
Devil's coach-horse beetle
Ocypus olens
255 observations in the last 30 days
14.85% introduced
Canada goose
Branta canadensis
2,939 observations in the last 30 days
14.29% introduced
Common wasp
Vespula vulgaris
564 observations in the last 30 days
10.71% introduced
Brown-tail moth
Euproctis chrysorrhoea
27 observations in the last 30 days
10.13% introduced
Garden banded snail
Cepaea hortensis
248 observations in the last 30 days
8.75% introduced
Domestic silk moth
Bombyx mori
Two observations in the last 30 days
8.2% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
859 observations in the last 30 days
5.5% introduced
Mallard
Anas platyrhynchos
4,869 observations in the last 30 days
5.39% introduced
Firebug
Pyrrhocoris apterus
2,278 observations in the last 30 days
5.03% introduced
Monarch butterfly
Danaus plexippus
9,860 observations in the last 30 days
4% introduced
Two-spot ladybird
Adalia bipunctata
286 observations in the last 30 days
3.99% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Five observations in the last 30 days
3.31% introduced
Drugstore beetle
Stegobium paniceum
Six observations in the last 30 days
3.03% introduced
Desert locust
Schistocerca gregaria
Four observations in the last 30 days
2.13% introduced
Two-spotted cricket
Gryllus bimaculatus
174 observations in the last 30 days
1.84% introduced
Flesh fly
Sarcophaga species
23 observations in the last 30 days
1.7% introduced
Corn snake
Pantherophis guttatus
112 observations in the last 30 days
1.53% introduced
Great house spider
Eratigena atrica
313 observations in the last 30 days
1.22% introduced
Dubia roach
Blaptica dubia
Two observations in the last 30 days
0.57% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
1,522 observations in the last 30 days
0.52% introduced
Sahara frog
Pelophylax saharicus
20 observations in the last 30 days
0.51% introduced
Forest cockroach
Planuncus tingitanus sensu lato
271 observations in the last 30 days
0.32% introducedPicnic beetle
Glischrochilus quadrisignatus
19 observations in the last 30 days
0.32% introduced
Bactrian camel
Camelus bactrianus
11 observations in the last 30 days
0.31% introduced
Garden bumblebee
Bombus hortorum
36 observations in the last 30 days
0.11% introduced
Sac spider
Clubiona species
16 observations in the last 30 days
0.1% introduced
Jumping spider
Marpissa muscosa
243 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
597 observations in the last 30 days
0.05% introduced
Rook
Corvus frugilegus
768 observations in the last 30 days
0.04% introduced