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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
286 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
168 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,121 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
394 observations in the last 30 days
99.59% introduced
European fallow deer
Dama dama
107 observations in the last 30 days
99.45% introduced
Brown anole
Anolis sagrei
1,826 observations in the last 30 days
99.36% introduced
Cattle
Bos taurus
81 observations in the last 30 days
99.01% introduced
Domestic sheep
Ovis aries
76 observations in the last 30 days
97.31% introduced
Brown marmorated stink bug
Halyomorpha halys
1,843 observations in the last 30 days
96.52% introduced
Box tree moth
Cydalima perspectalis
181 observations in the last 30 days
96.19% introduced
Asian ladybeetle
Harmonia axyridis
6,829 observations in the last 30 days
95.79% introduced
House mouse
Mus musculus
80 observations in the last 30 days
95.78% introducedCommon pheasant
Phasianus colchicus
719 observations in the last 30 days
94.79% introducedYak
Bos grunniens
Nine observations in the last 30 days
94.44% introducedDomestic duck
Anas platyrhynchos domesticus
680 observations in the last 30 days
94.32% introduced
Domestic dog
Canis lupus familiaris
385 observations in the last 30 days
92.48% introduced
Nutria
Myocastor coypus
370 observations in the last 30 days
88.39% introduced
Egyptian goose
Alopochen aegyptiaca
823 observations in the last 30 days
84.15% introduced
Domestic goat
Capra hircus
130 observations in the last 30 days
83.2% introducedEuropean rabbit
Oryctolagus cuniculus
467 observations in the last 30 days
82.06% introduced
Llama
Lama glama
Nine observations in the last 30 days
82.06% introduced
European honey bee
Apis mellifera
4,077 observations in the last 30 days
80.62% introduced
Domestic house spider
Tegenaria domestica
74 observations in the last 30 days
77.57% introduced
European paper wasp
Polistes dominula
338 observations in the last 30 days
74.67% introduced
Arion
Arion species
298 observations in the last 30 days
73.6% introduced
Common pill woodlouse
Armadillidium vulgare
1,292 observations in the last 30 days
70.06% introduced
Common earthworm
Lumbricus terrestris
69 observations in the last 30 days
69.8% introducedRock dove
Columba livia
3,345 observations in the last 30 days
67.64% introduced
Madagascar giant day gecko
Phelsuma grandis
27 observations in the last 30 days
64.37% introduced
Indian peafowl
Pavo cristatus
326 observations in the last 30 days
61.33% introduced
Garden snail
Cornu aspersum
1,575 observations in the last 30 days
56.39% introduced
Bathroom moth midge
Clogmia albipunctata
448 observations in the last 30 days
51.84% introduced
Leopard slug
Limax maximus
568 observations in the last 30 days
50.75% introducedShore crab
Carcinus maenas
280 observations in the last 30 days
50.41% introduced
Common green bottle fly
Lucilia sericata
78 observations in the last 30 days
49.31% introduced
Eurasian collared dove
Streptopelia decaocto
974 observations in the last 30 days
47.23% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
45.61% introduced
Housefly
Musca domestica
42 observations in the last 30 days
45.29% introduced
Common striped woodlouse
Philoscia muscorum
279 observations in the last 30 days
40.09% introduced
Seven-spot ladybird
Coccinella septempunctata
1,954 observations in the last 30 days
37.2% introduced
Domestic guinea pig
Cavia porcellus
Nine observations in the last 30 days
36.15% introduced
European garden spider
Araneus diadematus
1,765 observations in the last 30 days
35.64% introduced
Grove snail
Cepaea nemoralis
784 observations in the last 30 days
34.51% introduced
Common leopard gecko
Eublepharis macularius
Six observations in the last 30 days
32.73% introduced
European hornet
Vespa crabro
1,153 observations in the last 30 days
28.22% introduced
Dromedary
Camelus dromedarius
12 observations in the last 30 days
27.1% introducedSickle-bearing bush cricket
Phaneroptera species
429 observations in the last 30 days
24.4% introduced
Buff-tailed bumblebee
Bombus terrestris
356 observations in the last 30 days
23.53% introduced
Common crab spider
Xysticus cristatus
Seven observations in the last 30 days
22.75% introduced
Superworm
Zophobas atratus
Seven observations in the last 30 days
21.96% introduced
Mute swan
Cygnus olor
1,578 observations in the last 30 days
21.82% introduced
Yellow mealworm beetle
Tenebrio molitor
Two observations in the last 30 days
21.72% introduced
Human flea
Pulex irritans
Five observations in the last 30 days
20% introduced
Crane fly
Tipula species
134 observations in the last 30 days
16.23% introduced
Brown-tail moth
Euproctis chrysorrhoea
Four observations in the last 30 days
15.84% introduced
Devil's coach-horse beetle
Ocypus olens
291 observations in the last 30 days
13.64% introduced
Canada goose
Branta canadensis
2,613 observations in the last 30 days
13.52% introduced
Common wasp
Vespula vulgaris
282 observations in the last 30 days
9.87% introduced
Garden banded snail
Cepaea hortensis
181 observations in the last 30 days
8.37% introduced
Mallard
Anas platyrhynchos
4,632 observations in the last 30 days
8.29% introduced
Roman snail
Helix pomatia
152 observations in the last 30 days
5.69% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Firebug
Pyrrhocoris apterus
755 observations in the last 30 days
4.6% introduced
Domestic silk moth
Bombyx mori
No observations in the last 30 days
4.55% introduced
Two-spot ladybird
Adalia bipunctata
314 observations in the last 30 days
3.58% introduced
Monarch butterfly
Danaus plexippus
5,494 observations in the last 30 days
3.48% introduced
Desert locust
Schistocerca gregaria
20 observations in the last 30 days
2.85% introduced
Drugstore beetle
Stegobium paniceum
Six observations in the last 30 days
2.79% introduced
Two-spotted cricket
Gryllus bimaculatus
135 observations in the last 30 days
1.99% introduced
Corn snake
Pantherophis guttatus
102 observations in the last 30 days
1.82% introduced
Great house spider
Eratigena atrica
154 observations in the last 30 days
1.32% introduced
Flesh fly
Sarcophaga species
Three observations in the last 30 days
1.22% introduced
Sahara frog
Pelophylax saharicus
24 observations in the last 30 days
0.72% introduced
Dubia roach
Blaptica dubia
Five observations in the last 30 days
0.71% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
350 observations in the last 30 days
0.56% introduced
Bactrian camel
Camelus bactrianus
Three observations in the last 30 days
0.43% introducedPicnic beetle
Glischrochilus quadrisignatus
Seven observations in the last 30 days
0.26% introduced
Sac spider
Clubiona species
22 observations in the last 30 days
0.16% introduced
Garden bumblebee
Bombus hortorum
15 observations in the last 30 days
0.11% introduced
Rook
Corvus frugilegus
787 observations in the last 30 days
0.05% introduced
Sand lizard
Lacerta agilis
40 observations in the last 30 days
0.04% introduced
Forest cockroach
Planuncus tingitanus sensu lato
131 observations in the last 30 days
0.04% introduced