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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
339 observations in the last 30 days
100% introduced
Cattle
Bos taurus
312 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,622 observations in the last 30 days
99.99% introduced
Giant African land snail
Lissachatina fulica
563 observations in the last 30 days
99.54% introduced
European fallow deer
Dama dama
88 observations in the last 30 days
99.42% introduced
Brown anole
Anolis sagrei
1,413 observations in the last 30 days
99.15% introduced
Domestic sheep
Ovis aries
228 observations in the last 30 days
96.9% introduced
Asian ladybeetle
Harmonia axyridis
6,680 observations in the last 30 days
96.39% introduced
Brown marmorated stink bug
Halyomorpha halys
917 observations in the last 30 days
96.03% introduced
House mouse
Mus musculus
87 observations in the last 30 days
95.64% introduced
Box tree moth
Cydalima perspectalis
280 observations in the last 30 days
94.88% introduced
Domestic dog
Canis lupus familiaris
805 observations in the last 30 days
93.02% introduced
Nutria
Myocastor coypus
482 observations in the last 30 days
89.92% introduced
Egyptian goose
Alopochen aegyptiaca
1,272 observations in the last 30 days
84.5% introduced
Llama
Lama glama
49 observations in the last 30 days
84.13% introduced
Domestic goat
Capra hircus
266 observations in the last 30 days
81.81% introduced
European honey bee
Apis mellifera
5,846 observations in the last 30 days
80.41% introduced
European paper wasp
Polistes dominula
760 observations in the last 30 days
75.29% introduced
Domestic house spider
Tegenaria domestica
118 observations in the last 30 days
74.68% introduced
Common earthworm
Lumbricus terrestris
136 observations in the last 30 days
71.35% introduced
Arion
Arion species
550 observations in the last 30 days
70.98% introduced
Common pill woodlouse
Armadillidium vulgare
2,791 observations in the last 30 days
67.36% introduced
Madagascar giant day gecko
Phelsuma grandis
Seven observations in the last 30 days
65.73% introduced
Indian peafowl
Pavo cristatus
563 observations in the last 30 days
62.84% introduced
Garden snail
Cornu aspersum
2,288 observations in the last 30 days
56.47% introduced
Bathroom moth midge
Clogmia albipunctata
273 observations in the last 30 days
55.08% introduced
Leopard slug
Limax maximus
525 observations in the last 30 days
49.08% introduced
Eurasian collared dove
Streptopelia decaocto
1,800 observations in the last 30 days
49.03% introduced
Housefly
Musca domestica
175 observations in the last 30 days
47.58% introduced
Common green bottle fly
Lucilia sericata
102 observations in the last 30 days
47.4% introduced
Jamaican field cricket
Gryllus assimilis
Four observations in the last 30 days
44.44% introduced
Seven-spot ladybird
Coccinella septempunctata
4,423 observations in the last 30 days
41.57% introduced
Domestic guinea pig
Cavia porcellus
28 observations in the last 30 days
38.65% introduced
Common leopard gecko
Eublepharis macularius
Four observations in the last 30 days
37.78% introduced
European garden spider
Araneus diadematus
249 observations in the last 30 days
36.79% introduced
Common striped woodlouse
Philoscia muscorum
700 observations in the last 30 days
35.32% introduced
Grove snail
Cepaea nemoralis
1,747 observations in the last 30 days
34.61% introduced
European hornet
Vespa crabro
1,149 observations in the last 30 days
30.18% introduced
Buff-tailed bumblebee
Bombus terrestris
472 observations in the last 30 days
25.33% introduced
Yellow mealworm beetle
Tenebrio molitor
Nine observations in the last 30 days
24.76% introduced
Mute swan
Cygnus olor
2,258 observations in the last 30 days
22.96% introduced
Dromedary
Camelus dromedarius
19 observations in the last 30 days
22.14% introduced
Common crab spider
Xysticus cristatus
47 observations in the last 30 days
21.59% introduced
Sickle-bearing bush cricket
Phaneroptera species
157 observations in the last 30 days
20.35% introduced
Crane fly
Tipula species
880 observations in the last 30 days
16.34% introduced
Brown-tail moth
Euproctis chrysorrhoea
269 observations in the last 30 days
15.07% introduced
Devil's coach-horse beetle
Ocypus olens
53 observations in the last 30 days
14.1% introduced
Common wasp
Vespula vulgaris
354 observations in the last 30 days
13.15% introduced
Canada goose
Branta canadensis
6,191 observations in the last 30 days
12.48% introduced
Mallard
Anas platyrhynchos
7,627 observations in the last 30 days
9.28% introduced
Garden banded snail
Cepaea hortensis
560 observations in the last 30 days
8.24% introduced
Domestic silk moth
Bombyx mori
One observation in the last 30 days
5.71% introduced
Monarch butterfly
Danaus plexippus
2,126 observations in the last 30 days
5.6% introduced
Alpaca
Vicugna pacos
20 observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
1,520 observations in the last 30 days
5.29% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
5% introduced
Firebug
Pyrrhocoris apterus
1,830 observations in the last 30 days
4.75% introduced
Two-spot ladybird
Adalia bipunctata
846 observations in the last 30 days
4.13% introduced
Drugstore beetle
Stegobium paniceum
Ten observations in the last 30 days
2.93% introduced
Two-spotted cricket
Gryllus bimaculatus
64 observations in the last 30 days
2.5% introduced
Desert locust
Schistocerca gregaria
19 observations in the last 30 days
1.97% introduced
Flesh fly
Sarcophaga species
38 observations in the last 30 days
1.83% introduced
Corn snake
Pantherophis guttatus
280 observations in the last 30 days
1.39% introduced
Great house spider
Eratigena atrica
82 observations in the last 30 days
0.83% introduced
Dubia roach
Blaptica dubia
Two observations in the last 30 days
0.8% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
173 observations in the last 30 days
0.8% introduced
Sahara frog
Pelophylax saharicus
44 observations in the last 30 days
0.72% introduced
Bactrian camel
Camelus bactrianus
Seven observations in the last 30 days
0.55% introducedPicnic beetle
Glischrochilus quadrisignatus
102 observations in the last 30 days
0.35% introduced
Garden bumblebee
Bombus hortorum
417 observations in the last 30 days
0.17% introduced
Rook
Corvus frugilegus
690 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
1,132 observations in the last 30 days
0.03% introduced