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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
262 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,732 observations in the last 30 days
99.98% introduced
Chicken
Gallus gallus domesticus
584 observations in the last 30 days
99.97% introduced
Giant African land snail
Lissachatina fulica
574 observations in the last 30 days
99.56% introduced
Brown anole
Anolis sagrei
2,085 observations in the last 30 days
99.41% introduced
European fallow deer
Dama dama
109 observations in the last 30 days
99.39% introduced
Domestic sheep
Ovis aries
74 observations in the last 30 days
97.41% introduced
Cattle
Bos taurus
161 observations in the last 30 days
97.26% introduced
Brown marmorated stink bug
Halyomorpha halys
1,012 observations in the last 30 days
96.39% introduced
Box tree moth
Cydalima perspectalis
183 observations in the last 30 days
96.14% introduced
House mouse
Mus musculus
115 observations in the last 30 days
95.77% introduced
Asian ladybeetle
Harmonia axyridis
6,039 observations in the last 30 days
95.33% introducedCommon pheasant
Phasianus colchicus
1,753 observations in the last 30 days
94.81% introducedYak
Bos grunniens
12 observations in the last 30 days
94.74% introduced
Domestic dog
Canis lupus familiaris
573 observations in the last 30 days
93.49% introducedDomestic duck
Anas platyrhynchos domesticus
1,147 observations in the last 30 days
93.04% introduced
Nutria
Myocastor coypus
614 observations in the last 30 days
88.11% introduced
Domestic goat
Capra hircus
213 observations in the last 30 days
86.38% introduced
Egyptian goose
Alopochen aegyptiaca
1,767 observations in the last 30 days
85.91% introduced
Llama
Lama glama
Five observations in the last 30 days
82.37% introduced
European honey bee
Apis mellifera
5,775 observations in the last 30 days
80.34% introducedEuropean rabbit
Oryctolagus cuniculus
952 observations in the last 30 days
79.22% introduced
Domestic house spider
Tegenaria domestica
114 observations in the last 30 days
77.15% introduced
European paper wasp
Polistes dominula
541 observations in the last 30 days
73.93% introduced
Common pill woodlouse
Armadillidium vulgare
4,261 observations in the last 30 days
73.89% introduced
Arion
Arion species
573 observations in the last 30 days
72.92% introduced
Common earthworm
Lumbricus terrestris
260 observations in the last 30 days
70.36% introduced
Madagascar giant day gecko
Phelsuma grandis
25 observations in the last 30 days
66.3% introducedRock dove
Columba livia
6,233 observations in the last 30 days
62.29% introduced
Indian peafowl
Pavo cristatus
607 observations in the last 30 days
59.69% introduced
Garden snail
Cornu aspersum
2,967 observations in the last 30 days
58.25% introduced
Common green bottle fly
Lucilia sericata
283 observations in the last 30 days
57.48% introduced
Leopard slug
Limax maximus
769 observations in the last 30 days
52.87% introduced
Bathroom moth midge
Clogmia albipunctata
363 observations in the last 30 days
49.2% introduced
Housefly
Musca domestica
152 observations in the last 30 days
46.66% introduced
Eurasian collared dove
Streptopelia decaocto
2,255 observations in the last 30 days
46.13% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
43.55% introducedShore crab
Carcinus maenas
482 observations in the last 30 days
39.4% introduced
Common striped woodlouse
Philoscia muscorum
908 observations in the last 30 days
38.37% introduced
European garden spider
Araneus diadematus
198 observations in the last 30 days
36.84% introduced
Seven-spot ladybird
Coccinella septempunctata
7,212 observations in the last 30 days
36.16% introduced
Domestic guinea pig
Cavia porcellus
Seven observations in the last 30 days
35.9% introduced
Superworm
Zophobas atratus
Seven observations in the last 30 days
35.74% introduced
Grove snail
Cepaea nemoralis
2,104 observations in the last 30 days
33.67% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
31.75% introduced
Buff-tailed bumblebee
Bombus terrestris
792 observations in the last 30 days
29.56% introduced
European hornet
Vespa crabro
919 observations in the last 30 days
28.09% introducedSickle-bearing bush cricket
Phaneroptera species
226 observations in the last 30 days
27.71% introduced
Dromedary
Camelus dromedarius
24 observations in the last 30 days
24.21% introduced
Yellow mealworm beetle
Tenebrio molitor
Six observations in the last 30 days
23.02% introduced
Mute swan
Cygnus olor
2,837 observations in the last 30 days
21.63% introduced
Common crab spider
Xysticus cristatus
26 observations in the last 30 days
21.5% introduced
Crane fly
Tipula species
895 observations in the last 30 days
18.78% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
17.39% introduced
Devil's coach-horse beetle
Ocypus olens
68 observations in the last 30 days
15.07% introduced
Canada goose
Branta canadensis
7,482 observations in the last 30 days
13.98% introduced
Brown-tail moth
Euproctis chrysorrhoea
292 observations in the last 30 days
13.13% introduced
Common wasp
Vespula vulgaris
437 observations in the last 30 days
12.12% introduced
Garden banded snail
Cepaea hortensis
620 observations in the last 30 days
7.85% introduced
Domestic silk moth
Bombyx mori
Two observations in the last 30 days
7.55% introduced
Mallard
Anas platyrhynchos
9,410 observations in the last 30 days
6.24% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
1,112 observations in the last 30 days
5.47% introduced
Two-spot ladybird
Adalia bipunctata
911 observations in the last 30 days
4.64% introduced
Firebug
Pyrrhocoris apterus
2,759 observations in the last 30 days
4.64% introduced
Monarch butterfly
Danaus plexippus
2,796 observations in the last 30 days
4.52% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Four observations in the last 30 days
3.7% introduced
Drugstore beetle
Stegobium paniceum
17 observations in the last 30 days
2.75% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Six observations in the last 30 days
2.63% introduced
Flesh fly
Sarcophaga species
15 observations in the last 30 days
2.43% introduced
Desert locust
Schistocerca gregaria
16 observations in the last 30 days
2.16% introduced
Two-spotted cricket
Gryllus bimaculatus
49 observations in the last 30 days
1.86% introduced
Corn snake
Pantherophis guttatus
251 observations in the last 30 days
1.59% introduced
Great house spider
Eratigena atrica
203 observations in the last 30 days
1.2% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
194 observations in the last 30 days
0.63% introduced
Dubia roach
Blaptica dubia
Two observations in the last 30 days
0.62% introduced
Sahara frog
Pelophylax saharicus
34 observations in the last 30 days
0.58% introduced
Bactrian camel
Camelus bactrianus
Five observations in the last 30 days
0.38% introducedPicnic beetle
Glischrochilus quadrisignatus
82 observations in the last 30 days
0.33% introduced
Garden bumblebee
Bombus hortorum
328 observations in the last 30 days
0.13% introduced
Sac spider
Clubiona species
58 observations in the last 30 days
0.12% introduced
Rook
Corvus frugilegus
960 observations in the last 30 days
0.04% introduced
Sand lizard
Lacerta agilis
1,194 observations in the last 30 days
0.04% introduced
Forest cockroach
Planuncus tingitanus sensu lato
16 observations in the last 30 days
0.04% introduced