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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.
European fallow deer
Dama dama
46 observations in the last 30 days
100% introduced
Cattle
Bos taurus
143 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
216 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,635 observations in the last 30 days
100% introduced
Brown anole
Anolis sagrei
1,456 observations in the last 30 days
99.55% introduced
Giant African land snail
Lissachatina fulica
543 observations in the last 30 days
99.53% introduced
Asian ladybeetle
Harmonia axyridis
4,951 observations in the last 30 days
97.44% introduced
House mouse
Mus musculus
114 observations in the last 30 days
97.41% introduced
Domestic sheep
Ovis aries
93 observations in the last 30 days
97.17% introduced
Box tree moth
Cydalima perspectalis
530 observations in the last 30 days
96.39% introduced
Domestic dog
Canis lupus familiaris
618 observations in the last 30 days
95.55% introduced
Nutria
Myocastor coypus
347 observations in the last 30 days
94.81% introduced
Brown marmorated stink bug
Halyomorpha halys
891 observations in the last 30 days
91.02% introduced
Llama
Lama glama
14 observations in the last 30 days
89.23% introduced
European honey bee
Apis mellifera
4,776 observations in the last 30 days
83.9% introduced
Domestic goat
Capra hircus
133 observations in the last 30 days
83.48% introduced
Common earthworm
Lumbricus terrestris
230 observations in the last 30 days
76.26% introduced
European paper wasp
Polistes dominula
564 observations in the last 30 days
70.21% introduced
Common pill woodlouse
Armadillidium vulgare
1,616 observations in the last 30 days
65.97% introduced
Garden snail
Cornu aspersum
2,169 observations in the last 30 days
61.96% introduced
Arion
Arion species
369 observations in the last 30 days
58.96% introduced
Indian peafowl
Pavo cristatus
502 observations in the last 30 days
58.48% introduced
Bathroom moth midge
Clogmia albipunctata
206 observations in the last 30 days
55.97% introduced
Domestic guinea pig
Cavia porcellus
11 observations in the last 30 days
55.88% introduced
Domestic house spider
Tegenaria domestica
78 observations in the last 30 days
55.36% introduced
Eurasian collared dove
Streptopelia decaocto
1,741 observations in the last 30 days
54.8% introduced
Madagascar giant day gecko
Phelsuma grandis
14 observations in the last 30 days
51.56% introduced
Common green bottle fly
Lucilia sericata
81 observations in the last 30 days
43.35% introduced
European garden spider
Araneus diadematus
150 observations in the last 30 days
43.29% introduced
Common leopard gecko
Eublepharis macularius
Four observations in the last 30 days
41.38% introduced
Leopard slug
Limax maximus
698 observations in the last 30 days
41.29% introduced
Housefly
Musca domestica
100 observations in the last 30 days
39.83% introduced
Seven-spot ladybird
Coccinella septempunctata
5,418 observations in the last 30 days
39.74% introduced
Grove snail
Cepaea nemoralis
209 observations in the last 30 days
35.41% introduced
European hornet
Vespa crabro
711 observations in the last 30 days
30.19% introduced
Devil's coach-horse beetle
Ocypus olens
65 observations in the last 30 days
29.38% introduced
Common striped woodlouse
Philoscia muscorum
552 observations in the last 30 days
25.7% introduced
Dromedary
Camelus dromedarius
19 observations in the last 30 days
23.94% introduced
Mute swan
Cygnus olor
1,937 observations in the last 30 days
23.65% introduced
Common wasp
Vespula vulgaris
322 observations in the last 30 days
22.12% introduced
Brown-tail moth
Euproctis chrysorrhoea
106 observations in the last 30 days
21.27% introduced
Jamaican field cricket
Gryllus assimilis
Four observations in the last 30 days
20.69% introduced
Yellow mealworm beetle
Tenebrio molitor
13 observations in the last 30 days
18.42% introduced
Common crab spider
Xysticus cristatus
76 observations in the last 30 days
14.43% introduced
Monarch butterfly
Danaus plexippus
1,823 observations in the last 30 days
13.47% introduced
Buff-tailed bumblebee
Bombus terrestris
550 observations in the last 30 days
13.32% introduced
Canada goose
Branta canadensis
5,536 observations in the last 30 days
10.3% introduced
Mallard
Anas platyrhynchos
6,836 observations in the last 30 days
7.33% introduced
Garden banded snail
Cepaea hortensis
151 observations in the last 30 days
4.64% introduced
Firebug
Pyrrhocoris apterus
1,963 observations in the last 30 days
4.34% introduced
Roman snail
Helix pomatia
1,722 observations in the last 30 days
3.65% introduced
Two-spot ladybird
Adalia bipunctata
732 observations in the last 30 days
2.83% introduced
Alpaca
Vicugna pacos
Seven observations in the last 30 days
2.75% introduced
Drugstore beetle
Stegobium paniceum
Seven observations in the last 30 days
2.65% introduced
Crane fly
Tipula species
619 observations in the last 30 days
1.94% introduced
Sahara frog
Pelophylax saharicus
18 observations in the last 30 days
1.56% introduced
Two-spotted cricket
Gryllus bimaculatus
69 observations in the last 30 days
1.33% introduced
Great house spider
Eratigena atrica
75 observations in the last 30 days
0.79% introduced
Corn snake
Pantherophis guttatus
197 observations in the last 30 days
0.55% introduced
Rook
Corvus frugilegus
572 observations in the last 30 days
0.08% introduced