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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
262 observations in the last 30 days
100% introduced
Chicken
Gallus gallus domesticus
325 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,511 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
474 observations in the last 30 days
99.51% introduced
Brown anole
Anolis sagrei
1,533 observations in the last 30 days
99.49% introduced
European fallow deer
Dama dama
109 observations in the last 30 days
99.34% introduced
Domestic sheep
Ovis aries
85 observations in the last 30 days
97.78% introduced
Cattle
Bos taurus
141 observations in the last 30 days
96.96% introduced
Box tree moth
Cydalima perspectalis
1,779 observations in the last 30 days
96.41% introduced
Brown marmorated stink bug
Halyomorpha halys
1,449 observations in the last 30 days
96.12% introduced
Asian ladybeetle
Harmonia axyridis
6,202 observations in the last 30 days
95.99% introduced
House mouse
Mus musculus
99 observations in the last 30 days
95.99% introducedCommon pheasant
Phasianus colchicus
837 observations in the last 30 days
94.98% introduced
Domestic dog
Canis lupus familiaris
487 observations in the last 30 days
94.13% introducedDomestic duck
Anas platyrhynchos domesticus
865 observations in the last 30 days
94.08% introducedYak
Bos grunniens
19 observations in the last 30 days
92.07% introduced
Nutria
Myocastor coypus
508 observations in the last 30 days
88.47% introduced
Domestic goat
Capra hircus
156 observations in the last 30 days
87.99% introduced
Egyptian goose
Alopochen aegyptiaca
963 observations in the last 30 days
85.87% introduced
Llama
Lama glama
Five observations in the last 30 days
82.27% introducedEuropean rabbit
Oryctolagus cuniculus
570 observations in the last 30 days
79.89% introduced
European honey bee
Apis mellifera
5,926 observations in the last 30 days
78.77% introduced
Arion
Arion species
932 observations in the last 30 days
77.5% introduced
Domestic house spider
Tegenaria domestica
82 observations in the last 30 days
77.03% introduced
Common pill woodlouse
Armadillidium vulgare
1,871 observations in the last 30 days
74.33% introduced
European paper wasp
Polistes dominula
967 observations in the last 30 days
74.11% introduced
Common earthworm
Lumbricus terrestris
32 observations in the last 30 days
69.44% introduced
Madagascar giant day gecko
Phelsuma grandis
23 observations in the last 30 days
67.65% introducedRock dove
Columba livia
4,257 observations in the last 30 days
63.47% introduced
Indian peafowl
Pavo cristatus
450 observations in the last 30 days
60.17% introduced
Garden snail
Cornu aspersum
1,419 observations in the last 30 days
58.43% introduced
Leopard slug
Limax maximus
938 observations in the last 30 days
56.68% introduced
Common green bottle fly
Lucilia sericata
273 observations in the last 30 days
56.34% introduced
Bathroom moth midge
Clogmia albipunctata
375 observations in the last 30 days
48.95% introduced
Housefly
Musca domestica
63 observations in the last 30 days
45.71% introduced
Eurasian collared dove
Streptopelia decaocto
1,693 observations in the last 30 days
44.82% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
44.78% introduced
Common striped woodlouse
Philoscia muscorum
412 observations in the last 30 days
42% introducedShore crab
Carcinus maenas
448 observations in the last 30 days
40.89% introduced
Grove snail
Cepaea nemoralis
1,166 observations in the last 30 days
37.17% introduced
Seven-spot ladybird
Coccinella septempunctata
2,224 observations in the last 30 days
35.98% introduced
Superworm
Zophobas atratus
12 observations in the last 30 days
34.45% introduced
European garden spider
Araneus diadematus
3,161 observations in the last 30 days
33.82% introduced
Domestic guinea pig
Cavia porcellus
Eight observations in the last 30 days
33.46% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
29.58% introducedSickle-bearing bush cricket
Phaneroptera species
558 observations in the last 30 days
28.62% introduced
Dromedary
Camelus dromedarius
21 observations in the last 30 days
27.27% introduced
European hornet
Vespa crabro
2,133 observations in the last 30 days
25.84% introduced
Buff-tailed bumblebee
Bombus terrestris
566 observations in the last 30 days
24.7% introduced
Common crab spider
Xysticus cristatus
13 observations in the last 30 days
22.2% introduced
Mute swan
Cygnus olor
1,770 observations in the last 30 days
21.63% introduced
Yellow mealworm beetle
Tenebrio molitor
27 observations in the last 30 days
19.68% introduced
Crane fly
Tipula species
372 observations in the last 30 days
18.47% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
16% introduced
Devil's coach-horse beetle
Ocypus olens
94 observations in the last 30 days
14.8% introduced
Canada goose
Branta canadensis
2,869 observations in the last 30 days
14.27% introduced
Common wasp
Vespula vulgaris
469 observations in the last 30 days
11.05% introduced
Brown-tail moth
Euproctis chrysorrhoea
21 observations in the last 30 days
10.17% introduced
Garden banded snail
Cepaea hortensis
135 observations in the last 30 days
8.75% introduced
Domestic silk moth
Bombyx mori
One observation in the last 30 days
6.9% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
822 observations in the last 30 days
5.54% introduced
Mallard
Anas platyrhynchos
4,949 observations in the last 30 days
5.47% introduced
Firebug
Pyrrhocoris apterus
1,907 observations in the last 30 days
5.04% introduced
Monarch butterfly
Danaus plexippus
10,351 observations in the last 30 days
4.11% introduced
Two-spot ladybird
Adalia bipunctata
245 observations in the last 30 days
4% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Five observations in the last 30 days
3.39% introduced
Drugstore beetle
Stegobium paniceum
Nine observations in the last 30 days
3.04% introduced
Desert locust
Schistocerca gregaria
One observation in the last 30 days
2.17% introduced
Two-spotted cricket
Gryllus bimaculatus
79 observations in the last 30 days
1.91% introduced
Flesh fly
Sarcophaga species
36 observations in the last 30 days
1.73% introduced
Corn snake
Pantherophis guttatus
108 observations in the last 30 days
1.55% introduced
Great house spider
Eratigena atrica
272 observations in the last 30 days
1.22% introduced
Dubia roach
Blaptica dubia
Two observations in the last 30 days
0.57% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
2,116 observations in the last 30 days
0.53% introduced
Sahara frog
Pelophylax saharicus
19 observations in the last 30 days
0.51% introduced
Forest cockroach
Planuncus tingitanus sensu lato
336 observations in the last 30 days
0.33% introduced
Bactrian camel
Camelus bactrianus
Six observations in the last 30 days
0.32% introducedPicnic beetle
Glischrochilus quadrisignatus
26 observations in the last 30 days
0.32% introduced
Garden bumblebee
Bombus hortorum
81 observations in the last 30 days
0.11% introduced
Sac spider
Clubiona species
15 observations in the last 30 days
0.1% introduced
Jumping spider
Marpissa muscosa
360 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
728 observations in the last 30 days
0.05% introduced
Rook
Corvus frugilegus
683 observations in the last 30 days
0.04% introduced