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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 cat
Felis catus
954 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
185 observations in the last 30 days
100% introduced
Cattle
Bos taurus
95 observations in the last 30 days
99.89% introduced
Giant African land snail
Lissachatina fulica
216 observations in the last 30 days
99.63% introduced
European fallow deer
Dama dama
83 observations in the last 30 days
99.53% introduced
Brown anole
Anolis sagrei
1,152 observations in the last 30 days
99.46% introduced
Asian ladybeetle
Harmonia axyridis
4,163 observations in the last 30 days
97.3% introduced
House mouse
Mus musculus
88 observations in the last 30 days
96.14% introduced
Domestic sheep
Ovis aries
45 observations in the last 30 days
95.79% introduced
Brown marmorated stink bug
Halyomorpha halys
2,006 observations in the last 30 days
95.78% introduced
Domestic dog
Canis lupus familiaris
238 observations in the last 30 days
94.61% introduced
Box tree moth
Cydalima perspectalis
556 observations in the last 30 days
94.6% introduced
Nutria
Myocastor coypus
255 observations in the last 30 days
89.14% introduced
Llama
Lama glama
Nine observations in the last 30 days
86.96% introduced
Domestic goat
Capra hircus
82 observations in the last 30 days
84.34% introduced
European honey bee
Apis mellifera
4,391 observations in the last 30 days
81.67% introduced
Egyptian goose
Alopochen aegyptiaca
764 observations in the last 30 days
79.72% introduced
European paper wasp
Polistes dominula
769 observations in the last 30 days
78.52% introduced
Domestic house spider
Tegenaria domestica
48 observations in the last 30 days
75.94% introduced
Arion
Arion species
388 observations in the last 30 days
71.05% introduced
Common earthworm
Lumbricus terrestris
38 observations in the last 30 days
68.67% introduced
Indian peafowl
Pavo cristatus
269 observations in the last 30 days
64.5% introduced
Madagascar giant day gecko
Phelsuma grandis
14 observations in the last 30 days
59.9% introduced
Common pill woodlouse
Armadillidium vulgare
567 observations in the last 30 days
57.36% introduced
Garden snail
Cornu aspersum
1,314 observations in the last 30 days
56% introduced
Bathroom moth midge
Clogmia albipunctata
362 observations in the last 30 days
53.15% introduced
Eurasian collared dove
Streptopelia decaocto
871 observations in the last 30 days
51.12% introduced
Common green bottle fly
Lucilia sericata
65 observations in the last 30 days
48.21% introduced
Leopard slug
Limax maximus
742 observations in the last 30 days
47.81% introduced
Domestic guinea pig
Cavia porcellus
Nine observations in the last 30 days
46.43% introduced
Jamaican field cricket
Gryllus assimilis
Four observations in the last 30 days
45.45% introduced
Housefly
Musca domestica
67 observations in the last 30 days
42.19% introduced
Seven-spot ladybird
Coccinella septempunctata
1,551 observations in the last 30 days
41.96% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
41.18% introduced
Grove snail
Cepaea nemoralis
898 observations in the last 30 days
35.67% introduced
European garden spider
Araneus diadematus
2,896 observations in the last 30 days
35.17% introduced
European hornet
Vespa crabro
1,272 observations in the last 30 days
31.7% introduced
Dromedary
Camelus dromedarius
16 observations in the last 30 days
26.75% introduced
Common striped woodlouse
Philoscia muscorum
180 observations in the last 30 days
26.65% introduced
Mute swan
Cygnus olor
1,423 observations in the last 30 days
22.69% introduced
Brown-tail moth
Euproctis chrysorrhoea
Six observations in the last 30 days
21.13% introduced
Yellow mealworm beetle
Tenebrio molitor
Nine observations in the last 30 days
17.3% introduced
Buff-tailed bumblebee
Bombus terrestris
237 observations in the last 30 days
16.71% introduced
Sickle-bearing bush cricket
Phaneroptera species
515 observations in the last 30 days
16.49% introduced
Common crab spider
Xysticus cristatus
38 observations in the last 30 days
15.1% introduced
Crane fly
Tipula species
650 observations in the last 30 days
14.7% introduced
Canada goose
Branta canadensis
2,342 observations in the last 30 days
12.83% introduced
Devil's coach-horse beetle
Ocypus olens
543 observations in the last 30 days
12.58% introduced
Mallard
Anas platyrhynchos
4,232 observations in the last 30 days
9.85% introduced
Common wasp
Vespula vulgaris
398 observations in the last 30 days
7.76% introduced
Garden banded snail
Cepaea hortensis
257 observations in the last 30 days
7.74% introduced
Domestic silk moth
Bombyx mori
One observation in the last 30 days
7.41% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
7.14% introduced
Firebug
Pyrrhocoris apterus
876 observations in the last 30 days
5.62% introduced
Roman snail
Helix pomatia
423 observations in the last 30 days
5.26% introduced
Alpaca
Vicugna pacos
Six observations in the last 30 days
4.79% introduced
Monarch butterfly
Danaus plexippus
4,305 observations in the last 30 days
3.52% introduced
Two-spotted cricket
Gryllus bimaculatus
211 observations in the last 30 days
3.33% introduced
Drugstore beetle
Stegobium paniceum
Ten observations in the last 30 days
2.6% introduced
Desert locust
Schistocerca gregaria
Three observations in the last 30 days
1.97% introduced
Two-spot ladybird
Adalia bipunctata
577 observations in the last 30 days
1.69% introduced
Corn snake
Pantherophis guttatus
75 observations in the last 30 days
0.88% introduced
Great house spider
Eratigena atrica
106 observations in the last 30 days
0.87% introduced
Sahara frog
Pelophylax saharicus
Four observations in the last 30 days
0.7% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
636 observations in the last 30 days
0.66% introduced
Rook
Corvus frugilegus
557 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
154 observations in the last 30 days
0.05% introduced