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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
221 observations in the last 30 days
100% introduced
Chicken
Gallus gallus domesticus
342 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,402 observations in the last 30 days
99.98% introduced
Giant African land snail
Lissachatina fulica
311 observations in the last 30 days
99.59% introduced
Brown anole
Anolis sagrei
1,499 observations in the last 30 days
99.47% introduced
European fallow deer
Dama dama
62 observations in the last 30 days
99.43% introduced
Domestic sheep
Ovis aries
80 observations in the last 30 days
97.68% introduced
Cattle
Bos taurus
119 observations in the last 30 days
97.26% introduced
Box tree moth
Cydalima perspectalis
1,474 observations in the last 30 days
96.3% introduced
Brown marmorated stink bug
Halyomorpha halys
1,219 observations in the last 30 days
96.21% introduced
House mouse
Mus musculus
57 observations in the last 30 days
95.93% introduced
Asian ladybeetle
Harmonia axyridis
5,319 observations in the last 30 days
95.78% introducedCommon pheasant
Phasianus colchicus
712 observations in the last 30 days
94.75% introduced
Domestic dog
Canis lupus familiaris
397 observations in the last 30 days
93.92% introducedDomestic duck
Anas platyrhynchos domesticus
823 observations in the last 30 days
93.85% introducedYak
Bos grunniens
12 observations in the last 30 days
93.25% introduced
Nutria
Myocastor coypus
407 observations in the last 30 days
88.5% introduced
Domestic goat
Capra hircus
142 observations in the last 30 days
87.57% introduced
Egyptian goose
Alopochen aegyptiaca
1,016 observations in the last 30 days
86.03% introduced
Llama
Lama glama
Four observations in the last 30 days
82.28% introducedEuropean rabbit
Oryctolagus cuniculus
714 observations in the last 30 days
79.66% introduced
European honey bee
Apis mellifera
5,485 observations in the last 30 days
78.63% introduced
Domestic house spider
Tegenaria domestica
103 observations in the last 30 days
77.16% introduced
Arion
Arion species
860 observations in the last 30 days
75.62% introduced
Common pill woodlouse
Armadillidium vulgare
2,303 observations in the last 30 days
74% introduced
European paper wasp
Polistes dominula
887 observations in the last 30 days
73.67% introduced
Common earthworm
Lumbricus terrestris
35 observations in the last 30 days
69.24% introduced
Madagascar giant day gecko
Phelsuma grandis
45 observations in the last 30 days
66.87% introducedRock dove
Columba livia
4,262 observations in the last 30 days
63.15% introduced
Indian peafowl
Pavo cristatus
397 observations in the last 30 days
60.18% introduced
Garden snail
Cornu aspersum
1,367 observations in the last 30 days
58.32% introduced
Common green bottle fly
Lucilia sericata
316 observations in the last 30 days
58.3% introduced
Leopard slug
Limax maximus
817 observations in the last 30 days
54.86% introduced
Bathroom moth midge
Clogmia albipunctata
402 observations in the last 30 days
49.09% introduced
Housefly
Musca domestica
83 observations in the last 30 days
45.98% introduced
Eurasian collared dove
Streptopelia decaocto
1,534 observations in the last 30 days
45.09% introduced
Jamaican field cricket
Gryllus assimilis
Six observations in the last 30 days
43.94% introduced
Common striped woodlouse
Philoscia muscorum
435 observations in the last 30 days
40.36% introducedShore crab
Carcinus maenas
371 observations in the last 30 days
39% introduced
Superworm
Zophobas atratus
Seven observations in the last 30 days
36.42% introduced
Grove snail
Cepaea nemoralis
1,499 observations in the last 30 days
35.97% introduced
Seven-spot ladybird
Coccinella septempunctata
3,909 observations in the last 30 days
35.8% introduced
European garden spider
Araneus diadematus
1,583 observations in the last 30 days
35.47% introduced
Domestic guinea pig
Cavia porcellus
Nine observations in the last 30 days
33.72% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
30.43% introducedSickle-bearing bush cricket
Phaneroptera species
345 observations in the last 30 days
29.27% introduced
European hornet
Vespa crabro
968 observations in the last 30 days
26.48% introduced
Dromedary
Camelus dromedarius
18 observations in the last 30 days
25.84% introduced
Buff-tailed bumblebee
Bombus terrestris
1,021 observations in the last 30 days
25.77% introduced
Common crab spider
Xysticus cristatus
Ten observations in the last 30 days
21.87% introduced
Mute swan
Cygnus olor
1,769 observations in the last 30 days
21.61% introduced
Yellow mealworm beetle
Tenebrio molitor
86 observations in the last 30 days
20.7% introduced
Crane fly
Tipula species
122 observations in the last 30 days
18.27% introduced
Human flea
Pulex irritans
Six observations in the last 30 days
16% introduced
Devil's coach-horse beetle
Ocypus olens
133 observations in the last 30 days
14.95% introduced
Canada goose
Branta canadensis
3,184 observations in the last 30 days
14.08% introduced
Common wasp
Vespula vulgaris
189 observations in the last 30 days
11.87% introduced
Brown-tail moth
Euproctis chrysorrhoea
236 observations in the last 30 days
10.42% introduced
Garden banded snail
Cepaea hortensis
302 observations in the last 30 days
8.37% introduced
Domestic silk moth
Bombyx mori
No observations in the last 30 days
7.02% introduced
Mallard
Anas platyrhynchos
4,875 observations in the last 30 days
5.66% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
917 observations in the last 30 days
5.46% introduced
Firebug
Pyrrhocoris apterus
1,790 observations in the last 30 days
4.88% introduced
Monarch butterfly
Danaus plexippus
6,987 observations in the last 30 days
4.53% introduced
Two-spot ladybird
Adalia bipunctata
470 observations in the last 30 days
4.04% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Six observations in the last 30 days
3.39% introduced
Drugstore beetle
Stegobium paniceum
13 observations in the last 30 days
3.11% introduced
Desert locust
Schistocerca gregaria
Four observations in the last 30 days
2.08% introduced
Flesh fly
Sarcophaga species
30 observations in the last 30 days
1.9% introduced
Two-spotted cricket
Gryllus bimaculatus
51 observations in the last 30 days
1.9% introduced
Corn snake
Pantherophis guttatus
113 observations in the last 30 days
1.55% introduced
Great house spider
Eratigena atrica
102 observations in the last 30 days
1.19% introduced
Dubia roach
Blaptica dubia
One observation in the last 30 days
0.58% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
2,077 observations in the last 30 days
0.56% introduced
Sahara frog
Pelophylax saharicus
Six observations in the last 30 days
0.52% introducedPicnic beetle
Glischrochilus quadrisignatus
88 observations in the last 30 days
0.34% introduced
Bactrian camel
Camelus bactrianus
Seven observations in the last 30 days
0.33% introduced
Forest cockroach
Planuncus tingitanus sensu lato
530 observations in the last 30 days
0.27% introduced
Sac spider
Clubiona species
20 observations in the last 30 days
0.1% introduced
Garden bumblebee
Bombus hortorum
362 observations in the last 30 days
0.09% introduced
Jumping spider
Marpissa muscosa
309 observations in the last 30 days
0.07% introduced
Sand lizard
Lacerta agilis
716 observations in the last 30 days
0.05% introduced
Rook
Corvus frugilegus
595 observations in the last 30 days
0.04% introduced