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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
252 observations in the last 30 days
100% introduced
Chicken
Gallus gallus domesticus
324 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,540 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
426 observations in the last 30 days
99.52% introduced
Brown anole
Anolis sagrei
1,558 observations in the last 30 days
99.49% introduced
European fallow deer
Dama dama
104 observations in the last 30 days
99.34% introduced
Domestic sheep
Ovis aries
83 observations in the last 30 days
97.79% introduced
Cattle
Bos taurus
132 observations in the last 30 days
96.92% introduced
Box tree moth
Cydalima perspectalis
1,936 observations in the last 30 days
96.44% introduced
Brown marmorated stink bug
Halyomorpha halys
1,460 observations in the last 30 days
96.1% introduced
Asian ladybeetle
Harmonia axyridis
6,357 observations in the last 30 days
96.01% introduced
House mouse
Mus musculus
99 observations in the last 30 days
95.97% introducedCommon pheasant
Phasianus colchicus
842 observations in the last 30 days
94.97% introduced
Domestic dog
Canis lupus familiaris
513 observations in the last 30 days
94.16% introducedDomestic duck
Anas platyrhynchos domesticus
849 observations in the last 30 days
94.11% introducedYak
Bos grunniens
18 observations in the last 30 days
92.12% introduced
Nutria
Myocastor coypus
510 observations in the last 30 days
88.45% introduced
Domestic goat
Capra hircus
157 observations in the last 30 days
88.06% introduced
Egyptian goose
Alopochen aegyptiaca
956 observations in the last 30 days
85.86% introduced
Llama
Lama glama
Six observations in the last 30 days
82.11% introducedEuropean rabbit
Oryctolagus cuniculus
563 observations in the last 30 days
79.93% introduced
European honey bee
Apis mellifera
6,186 observations in the last 30 days
78.85% introduced
Arion
Arion species
985 observations in the last 30 days
77.73% introduced
Domestic house spider
Tegenaria domestica
79 observations in the last 30 days
76.96% introduced
Common pill woodlouse
Armadillidium vulgare
1,910 observations in the last 30 days
74.37% introduced
European paper wasp
Polistes dominula
1,021 observations in the last 30 days
74.22% introduced
Common earthworm
Lumbricus terrestris
36 observations in the last 30 days
69.49% introduced
Madagascar giant day gecko
Phelsuma grandis
27 observations in the last 30 days
67.49% introducedRock dove
Columba livia
4,307 observations in the last 30 days
63.54% introduced
Indian peafowl
Pavo cristatus
449 observations in the last 30 days
60.14% introduced
Garden snail
Cornu aspersum
1,528 observations in the last 30 days
58.52% introduced
Leopard slug
Limax maximus
948 observations in the last 30 days
56.74% introduced
Common green bottle fly
Lucilia sericata
354 observations in the last 30 days
56.7% introduced
Bathroom moth midge
Clogmia albipunctata
386 observations in the last 30 days
48.91% introduced
Housefly
Musca domestica
73 observations in the last 30 days
45.66% introduced
Eurasian collared dove
Streptopelia decaocto
1,676 observations in the last 30 days
44.81% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
44.78% introduced
Common striped woodlouse
Philoscia muscorum
433 observations in the last 30 days
42.13% introducedShore crab
Carcinus maenas
375 observations in the last 30 days
40.76% introduced
Grove snail
Cepaea nemoralis
1,312 observations in the last 30 days
37.17% introduced
Seven-spot ladybird
Coccinella septempunctata
2,284 observations in the last 30 days
36% introduced
Superworm
Zophobas atratus
Ten observations in the last 30 days
34.45% introduced
European garden spider
Araneus diadematus
3,463 observations in the last 30 days
33.56% introduced
Domestic guinea pig
Cavia porcellus
Nine observations in the last 30 days
33.21% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
29.58% introducedSickle-bearing bush cricket
Phaneroptera species
582 observations in the last 30 days
28.43% introduced
Dromedary
Camelus dromedarius
23 observations in the last 30 days
27.67% introduced
European hornet
Vespa crabro
2,320 observations in the last 30 days
25.91% introduced
Buff-tailed bumblebee
Bombus terrestris
513 observations in the last 30 days
24.7% introduced
Common crab spider
Xysticus cristatus
Nine observations in the last 30 days
22.2% introduced
Mute swan
Cygnus olor
1,785 observations in the last 30 days
21.64% introduced
Yellow mealworm beetle
Tenebrio molitor
22 observations in the last 30 days
19.59% introduced
Crane fly
Tipula species
404 observations in the last 30 days
18.58% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
16% introduced
Devil's coach-horse beetle
Ocypus olens
131 observations in the last 30 days
14.7% introduced
Canada goose
Branta canadensis
2,889 observations in the last 30 days
14.28% introduced
Common wasp
Vespula vulgaris
507 observations in the last 30 days
10.95% introduced
Brown-tail moth
Euproctis chrysorrhoea
23 observations in the last 30 days
10.16% introduced
Garden banded snail
Cepaea hortensis
163 observations in the last 30 days
8.73% 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
866 observations in the last 30 days
5.52% introduced
Mallard
Anas platyrhynchos
4,972 observations in the last 30 days
5.44% introduced
Firebug
Pyrrhocoris apterus
2,098 observations in the last 30 days
5.03% introduced
Monarch butterfly
Danaus plexippus
10,407 observations in the last 30 days
4.07% introduced
Two-spot ladybird
Adalia bipunctata
256 observations in the last 30 days
3.99% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Five observations in the last 30 days
3.36% introduced
Drugstore beetle
Stegobium paniceum
Eight observations in the last 30 days
3.04% introduced
Desert locust
Schistocerca gregaria
Two observations in the last 30 days
2.14% introduced
Two-spotted cricket
Gryllus bimaculatus
106 observations in the last 30 days
1.92% introduced
Flesh fly
Sarcophaga species
29 observations in the last 30 days
1.72% introduced
Corn snake
Pantherophis guttatus
108 observations in the last 30 days
1.54% introduced
Great house spider
Eratigena atrica
309 observations in the last 30 days
1.2% introduced
Dubia roach
Blaptica dubia
One observation in the last 30 days
0.57% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
1,983 observations in the last 30 days
0.53% introduced
Sahara frog
Pelophylax saharicus
20 observations in the last 30 days
0.51% introduced
Forest cockroach
Planuncus tingitanus sensu lato
318 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
18 observations in the last 30 days
0.32% introduced
Garden bumblebee
Bombus hortorum
68 observations in the last 30 days
0.11% introduced
Sac spider
Clubiona species
18 observations in the last 30 days
0.1% introduced
Jumping spider
Marpissa muscosa
345 observations in the last 30 days
0.06% introduced
Sand lizard
Lacerta agilis
710 observations in the last 30 days
0.05% introduced
Rook
Corvus frugilegus
726 observations in the last 30 days
0.04% introduced