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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
188 observations in the last 30 days
100% introduced
Chicken
Gallus gallus domesticus
260 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,605 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
416 observations in the last 30 days
99.52% introduced
Brown anole
Anolis sagrei
1,662 observations in the last 30 days
99.51% introduced
European fallow deer
Dama dama
124 observations in the last 30 days
99.37% introduced
Domestic sheep
Ovis aries
99 observations in the last 30 days
97.88% introduced
Cattle
Bos taurus
110 observations in the last 30 days
96.82% introduced
Asian ladybeetle
Harmonia axyridis
5,862 observations in the last 30 days
96.17% introduced
Box tree moth
Cydalima perspectalis
874 observations in the last 30 days
96.14% introduced
Brown marmorated stink bug
Halyomorpha halys
2,185 observations in the last 30 days
96.1% introduced
House mouse
Mus musculus
105 observations in the last 30 days
95.99% introducedCommon pheasant
Phasianus colchicus
808 observations in the last 30 days
95.03% introduced
Domestic dog
Canis lupus familiaris
480 observations in the last 30 days
94.34% introducedDomestic duck
Anas platyrhynchos domesticus
745 observations in the last 30 days
94.18% introducedYak
Bos grunniens
13 observations in the last 30 days
92.41% introduced
Nutria
Myocastor coypus
486 observations in the last 30 days
88.33% introduced
Domestic goat
Capra hircus
152 observations in the last 30 days
88.27% introduced
Egyptian goose
Alopochen aegyptiaca
963 observations in the last 30 days
85.6% introduced
Llama
Lama glama
Four observations in the last 30 days
82% introducedEuropean rabbit
Oryctolagus cuniculus
610 observations in the last 30 days
80.51% introduced
European honey bee
Apis mellifera
5,900 observations in the last 30 days
79.17% introduced
Arion
Arion species
675 observations in the last 30 days
78.31% introduced
Domestic house spider
Tegenaria domestica
46 observations in the last 30 days
76.47% introduced
Common pill woodlouse
Armadillidium vulgare
1,792 observations in the last 30 days
74.73% introduced
European paper wasp
Polistes dominula
506 observations in the last 30 days
74.57% introduced
Common earthworm
Lumbricus terrestris
50 observations in the last 30 days
69.25% introduced
Madagascar giant day gecko
Phelsuma grandis
75 observations in the last 30 days
67.3% introducedRock dove
Columba livia
4,504 observations in the last 30 days
64.16% introduced
Indian peafowl
Pavo cristatus
382 observations in the last 30 days
59.97% introduced
Garden snail
Cornu aspersum
2,018 observations in the last 30 days
58.9% introduced
Leopard slug
Limax maximus
838 observations in the last 30 days
57.4% introduced
Common green bottle fly
Lucilia sericata
232 observations in the last 30 days
56.63% introduced
Bathroom moth midge
Clogmia albipunctata
433 observations in the last 30 days
48.65% introduced
Housefly
Musca domestica
69 observations in the last 30 days
45.51% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
44.78% introduced
Eurasian collared dove
Streptopelia decaocto
1,335 observations in the last 30 days
44.68% introduced
Common striped woodlouse
Philoscia muscorum
433 observations in the last 30 days
42.69% introducedShore crab
Carcinus maenas
604 observations in the last 30 days
41.77% introduced
Grove snail
Cepaea nemoralis
1,491 observations in the last 30 days
37.85% introduced
Seven-spot ladybird
Coccinella septempunctata
3,095 observations in the last 30 days
36.09% introduced
Superworm
Zophobas atratus
20 observations in the last 30 days
34.32% introduced
Domestic guinea pig
Cavia porcellus
12 observations in the last 30 days
33.8% introduced
European garden spider
Araneus diadematus
3,632 observations in the last 30 days
33.37% introduced
Dromedary
Camelus dromedarius
25 observations in the last 30 days
28.49% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
28.38% introducedSickle-bearing bush cricket
Phaneroptera species
527 observations in the last 30 days
28.28% introduced
European hornet
Vespa crabro
2,075 observations in the last 30 days
26.01% introduced
Buff-tailed bumblebee
Bombus terrestris
374 observations in the last 30 days
24.82% introduced
Common crab spider
Xysticus cristatus
14 observations in the last 30 days
22.23% introduced
Mute swan
Cygnus olor
1,828 observations in the last 30 days
21.65% introduced
Crane fly
Tipula species
591 observations in the last 30 days
19.4% introduced
Yellow mealworm beetle
Tenebrio molitor
11 observations in the last 30 days
19.37% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
16% introduced
Devil's coach-horse beetle
Ocypus olens
440 observations in the last 30 days
14.29% introduced
Canada goose
Branta canadensis
3,125 observations in the last 30 days
14.25% introduced
Common wasp
Vespula vulgaris
505 observations in the last 30 days
10.19% introduced
Brown-tail moth
Euproctis chrysorrhoea
22 observations in the last 30 days
10.08% introduced
Garden banded snail
Cepaea hortensis
256 observations in the last 30 days
8.85% introduced
Domestic silk moth
Bombyx mori
Two observations in the last 30 days
7.94% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
360 observations in the last 30 days
5.48% introduced
Mallard
Anas platyrhynchos
5,306 observations in the last 30 days
5.28% introduced
Firebug
Pyrrhocoris apterus
1,762 observations in the last 30 days
5.09% introduced
Two-spot ladybird
Adalia bipunctata
399 observations in the last 30 days
3.96% introduced
Monarch butterfly
Danaus plexippus
7,106 observations in the last 30 days
3.88% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Five observations in the last 30 days
3.28% introduced
Drugstore beetle
Stegobium paniceum
Seven observations in the last 30 days
2.74% introduced
Desert locust
Schistocerca gregaria
Six observations in the last 30 days
2.34% introduced
Two-spotted cricket
Gryllus bimaculatus
338 observations in the last 30 days
1.89% introduced
Flesh fly
Sarcophaga species
15 observations in the last 30 days
1.64% introduced
Corn snake
Pantherophis guttatus
124 observations in the last 30 days
1.49% introduced
Great house spider
Eratigena atrica
271 observations in the last 30 days
1.17% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
1,298 observations in the last 30 days
0.54% introduced
Dubia roach
Blaptica dubia
Six observations in the last 30 days
0.54% introduced
Sahara frog
Pelophylax saharicus
16 observations in the last 30 days
0.49% introduced
Forest cockroach
Planuncus tingitanus sensu lato
157 observations in the last 30 days
0.34% introducedPicnic beetle
Glischrochilus quadrisignatus
15 observations in the last 30 days
0.32% introduced
Bactrian camel
Camelus bactrianus
Five observations in the last 30 days
0.31% introduced
Garden bumblebee
Bombus hortorum
Eight observations in the last 30 days
0.11% introduced
Sac spider
Clubiona species
12 observations in the last 30 days
0.1% introduced
Jumping spider
Marpissa muscosa
95 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
227 observations in the last 30 days
0.05% introduced
Rook
Corvus frugilegus
884 observations in the last 30 days
0.04% introduced