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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.
Chicken
Gallus gallus domesticus
110 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
211 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,136 observations in the last 30 days
99.98% introduced
Cattle
Bos taurus
116 observations in the last 30 days
99.92% introduced
Giant African land snail
Lissachatina fulica
364 observations in the last 30 days
99.56% introduced
European fallow deer
Dama dama
85 observations in the last 30 days
99.36% introduced
Brown anole
Anolis sagrei
1,208 observations in the last 30 days
99.28% introduced
Domestic sheep
Ovis aries
83 observations in the last 30 days
97.23% introduced
Box tree moth
Cydalima perspectalis
1,535 observations in the last 30 days
96.37% introduced
Brown marmorated stink bug
Halyomorpha halys
1,324 observations in the last 30 days
96.2% introduced
Asian ladybeetle
Harmonia axyridis
5,517 observations in the last 30 days
95.76% introduced
House mouse
Mus musculus
72 observations in the last 30 days
95.58% introducedYak
Bos grunniens
15 observations in the last 30 days
95% introducedCommon pheasant
Phasianus colchicus
114 observations in the last 30 days
94.74% introducedEuropean rabbit
Oryctolagus cuniculus
108 observations in the last 30 days
93.52% introducedDomestic duck
Anas platyrhynchos domesticus
118 observations in the last 30 days
92.37% introduced
Domestic dog
Canis lupus familiaris
392 observations in the last 30 days
92.04% introduced
Nutria
Myocastor coypus
397 observations in the last 30 days
89.11% introduced
Egyptian goose
Alopochen aegyptiaca
755 observations in the last 30 days
84.82% introduced
Llama
Lama glama
Seven observations in the last 30 days
83.29% introduced
Domestic goat
Capra hircus
142 observations in the last 30 days
82.96% introduced
European honey bee
Apis mellifera
4,177 observations in the last 30 days
79.29% introduced
Domestic house spider
Tegenaria domestica
154 observations in the last 30 days
78.21% introduced
European paper wasp
Polistes dominula
846 observations in the last 30 days
74.53% introduced
Arion
Arion species
591 observations in the last 30 days
73.8% introduced
Common earthworm
Lumbricus terrestris
36 observations in the last 30 days
70.53% introduced
Common pill woodlouse
Armadillidium vulgare
1,289 observations in the last 30 days
68.03% introducedRock dove
Columba livia
193 observations in the last 30 days
67.88% introduced
Madagascar giant day gecko
Phelsuma grandis
39 observations in the last 30 days
67.59% introduced
Indian peafowl
Pavo cristatus
375 observations in the last 30 days
62.45% introduced
Garden snail
Cornu aspersum
1,497 observations in the last 30 days
55.9% introduced
Bathroom moth midge
Clogmia albipunctata
424 observations in the last 30 days
53.18% introduced
Leopard slug
Limax maximus
710 observations in the last 30 days
48.98% introduced
Eurasian collared dove
Streptopelia decaocto
1,203 observations in the last 30 days
47.5% introduced
Jamaican field cricket
Gryllus assimilis
Four observations in the last 30 days
46.43% introduced
Common green bottle fly
Lucilia sericata
60 observations in the last 30 days
46.24% introduced
Housefly
Musca domestica
53 observations in the last 30 days
45.77% introduced
Common striped woodlouse
Philoscia muscorum
226 observations in the last 30 days
39.4% introduced
Domestic guinea pig
Cavia porcellus
Three observations in the last 30 days
37.63% introduced
Seven-spot ladybird
Coccinella septempunctata
2,479 observations in the last 30 days
37.6% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
36.73% introduced
Grove snail
Cepaea nemoralis
1,250 observations in the last 30 days
34.09% introduced
European garden spider
Araneus diadematus
3,566 observations in the last 30 days
33.77% introduced
European hornet
Vespa crabro
2,181 observations in the last 30 days
26.28% introduced
Dromedary
Camelus dromedarius
19 observations in the last 30 days
24.9% introducedSickle-bearing bush cricket
Phaneroptera species
628 observations in the last 30 days
23.64% introduced
Mute swan
Cygnus olor
1,488 observations in the last 30 days
22.36% introduced
Buff-tailed bumblebee
Bombus terrestris
321 observations in the last 30 days
22.09% introduced
Common crab spider
Xysticus cristatus
13 observations in the last 30 days
21.8% introduced
Human flea
Pulex irritans
Five observations in the last 30 days
20% introduced
Yellow mealworm beetle
Tenebrio molitor
21 observations in the last 30 days
19.91% introduced
Brown-tail moth
Euproctis chrysorrhoea
12 observations in the last 30 days
16.15% introduced
Crane fly
Tipula species
221 observations in the last 30 days
15.51% introduced
Devil's coach-horse beetle
Ocypus olens
87 observations in the last 30 days
14.42% introduced
Canada goose
Branta canadensis
2,182 observations in the last 30 days
13.46% introduced
Common wasp
Vespula vulgaris
318 observations in the last 30 days
10.43% introduced
Mallard
Anas platyrhynchos
4,235 observations in the last 30 days
9.07% introduced
Garden banded snail
Cepaea hortensis
247 observations in the last 30 days
8.62% introduced
Roman snail
Helix pomatia
764 observations in the last 30 days
5.73% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
5% introduced
Firebug
Pyrrhocoris apterus
1,237 observations in the last 30 days
4.58% introduced
Domestic silk moth
Bombyx mori
One observation in the last 30 days
4.55% introduced
Monarch butterfly
Danaus plexippus
10,621 observations in the last 30 days
4.06% introduced
Two-spot ladybird
Adalia bipunctata
215 observations in the last 30 days
3.29% introduced
Drugstore beetle
Stegobium paniceum
11 observations in the last 30 days
2.33% introduced
Desert locust
Schistocerca gregaria
Three observations in the last 30 days
2.12% introduced
Two-spotted cricket
Gryllus bimaculatus
110 observations in the last 30 days
2.11% introduced
Corn snake
Pantherophis guttatus
98 observations in the last 30 days
1.56% introduced
Flesh fly
Sarcophaga species
Ten observations in the last 30 days
1.42% introduced
Great house spider
Eratigena atrica
205 observations in the last 30 days
0.93% introduced
Sahara frog
Pelophylax saharicus
14 observations in the last 30 days
0.79% introduced
Dubia roach
Blaptica dubia
Two observations in the last 30 days
0.76% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
1,170 observations in the last 30 days
0.48% introduced
Bactrian camel
Camelus bactrianus
Six observations in the last 30 days
0.46% introducedPicnic beetle
Glischrochilus quadrisignatus
34 observations in the last 30 days
0.28% introduced
Sac spider
Clubiona species
Eight observations in the last 30 days
0.18% introduced
Garden bumblebee
Bombus hortorum
100 observations in the last 30 days
0.12% introduced
Rook
Corvus frugilegus
520 observations in the last 30 days
0.05% introduced
Sand lizard
Lacerta agilis
863 observations in the last 30 days
0.04% introduced