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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
104 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,092 observations in the last 30 days
99.99% introduced
Cattle
Bos taurus
99 observations in the last 30 days
99.86% introduced
Giant African land snail
Lissachatina fulica
260 observations in the last 30 days
99.55% introduced
European fallow deer
Dama dama
94 observations in the last 30 days
99.38% introduced
Brown anole
Anolis sagrei
1,066 observations in the last 30 days
99.01% introduced
Asian ladybeetle
Harmonia axyridis
1,728 observations in the last 30 days
96.75% introduced
Domestic sheep
Ovis aries
55 observations in the last 30 days
96.49% introduced
Brown marmorated stink bug
Halyomorpha halys
639 observations in the last 30 days
96.23% introduced
House mouse
Mus musculus
58 observations in the last 30 days
95.81% introduced
Box tree moth
Cydalima perspectalis
Five observations in the last 30 days
94.67% introduced
Domestic dog
Canis lupus familiaris
470 observations in the last 30 days
92.61% introduced
Nutria
Myocastor coypus
409 observations in the last 30 days
88.87% introduced
Llama
Lama glama
11 observations in the last 30 days
86.45% introduced
Domestic goat
Capra hircus
127 observations in the last 30 days
83.88% introduced
Egyptian goose
Alopochen aegyptiaca
854 observations in the last 30 days
82.83% introduced
European honey bee
Apis mellifera
3,232 observations in the last 30 days
82.06% introduced
European paper wasp
Polistes dominula
275 observations in the last 30 days
77.7% introduced
Domestic house spider
Tegenaria domestica
34 observations in the last 30 days
73.75% introduced
Arion
Arion species
65 observations in the last 30 days
70.08% introduced
Common earthworm
Lumbricus terrestris
50 observations in the last 30 days
69.49% introduced
Indian peafowl
Pavo cristatus
245 observations in the last 30 days
62.55% introduced
Common pill woodlouse
Armadillidium vulgare
1,020 observations in the last 30 days
62.24% introduced
Madagascar giant day gecko
Phelsuma grandis
Five observations in the last 30 days
60.94% introduced
Garden snail
Cornu aspersum
1,109 observations in the last 30 days
58% introduced
Bathroom moth midge
Clogmia albipunctata
155 observations in the last 30 days
55.09% introduced
Eurasian collared dove
Streptopelia decaocto
1,318 observations in the last 30 days
50.65% introduced
Leopard slug
Limax maximus
187 observations in the last 30 days
49.04% introduced
Common green bottle fly
Lucilia sericata
28 observations in the last 30 days
47.96% introduced
Housefly
Musca domestica
50 observations in the last 30 days
47.47% introduced
Jamaican field cricket
Gryllus assimilis
Four observations in the last 30 days
46.15% introduced
Domestic guinea pig
Cavia porcellus
Six observations in the last 30 days
45.83% introduced
Seven-spot ladybird
Coccinella septempunctata
1,697 observations in the last 30 days
41.5% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
41.03% introduced
European garden spider
Araneus diadematus
24 observations in the last 30 days
36.92% introduced
Grove snail
Cepaea nemoralis
354 observations in the last 30 days
33.78% introduced
European hornet
Vespa crabro
51 observations in the last 30 days
32.03% introduced
Buff-tailed bumblebee
Bombus terrestris
645 observations in the last 30 days
28.5% introduced
Common striped woodlouse
Philoscia muscorum
287 observations in the last 30 days
27.96% introduced
Yellow mealworm beetle
Tenebrio molitor
Six observations in the last 30 days
24.57% introduced
Dromedary
Camelus dromedarius
Eight observations in the last 30 days
23.63% introduced
Mute swan
Cygnus olor
1,464 observations in the last 30 days
23.15% introduced
Brown-tail moth
Euproctis chrysorrhoea
Eight observations in the last 30 days
20.91% introduced
Common crab spider
Xysticus cristatus
12 observations in the last 30 days
17.08% introduced
Sickle-bearing bush cricket
Phaneroptera species
12 observations in the last 30 days
15.95% introduced
Crane fly
Tipula species
43 observations in the last 30 days
14.82% introduced
Devil's coach-horse beetle
Ocypus olens
22 observations in the last 30 days
14.33% introduced
Canada goose
Branta canadensis
3,931 observations in the last 30 days
12.48% introduced
Common wasp
Vespula vulgaris
139 observations in the last 30 days
11.56% introduced
Mallard
Anas platyrhynchos
5,608 observations in the last 30 days
10.5% introduced
Garden banded snail
Cepaea hortensis
59 observations in the last 30 days
6.92% introduced
Domestic silk moth
Bombyx mori
Two observations in the last 30 days
6.06% introduced
Firebug
Pyrrhocoris apterus
941 observations in the last 30 days
5.22% introduced
Roman snail
Helix pomatia
205 observations in the last 30 days
5.12% introduced
Alpaca
Vicugna pacos
Six observations in the last 30 days
5.03% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
5% introduced
Monarch butterfly
Danaus plexippus
965 observations in the last 30 days
4.98% introduced
Two-spot ladybird
Adalia bipunctata
148 observations in the last 30 days
3.87% introduced
Two-spotted cricket
Gryllus bimaculatus
23 observations in the last 30 days
2.73% introduced
Drugstore beetle
Stegobium paniceum
Ten observations in the last 30 days
2.09% introduced
Desert locust
Schistocerca gregaria
20 observations in the last 30 days
1.72% introduced
Corn snake
Pantherophis guttatus
84 observations in the last 30 days
1.53% introduced
Flesh fly
Sarcophaga species
Four observations in the last 30 days
1.08% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
255 observations in the last 30 days
0.86% introduced
Great house spider
Eratigena atrica
38 observations in the last 30 days
0.84% introduced
Sahara frog
Pelophylax saharicus
17 observations in the last 30 days
0.7% introducedPicnic beetle
Glischrochilus quadrisignatus
Five observations in the last 30 days
0.28% introduced
Garden bumblebee
Bombus hortorum
38 observations in the last 30 days
0.19% introduced
Rook
Corvus frugilegus
975 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
47 observations in the last 30 days
0.04% introduced