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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
297 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
200 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,108 observations in the last 30 days
99.99% introduced
Giant African land snail
Lissachatina fulica
401 observations in the last 30 days
99.6% introduced
European fallow deer
Dama dama
87 observations in the last 30 days
99.42% introduced
Brown anole
Anolis sagrei
1,685 observations in the last 30 days
99.34% introduced
Cattle
Bos taurus
90 observations in the last 30 days
99.19% introduced
Domestic sheep
Ovis aries
80 observations in the last 30 days
97.3% introduced
Brown marmorated stink bug
Halyomorpha halys
2,070 observations in the last 30 days
96.53% introduced
Box tree moth
Cydalima perspectalis
489 observations in the last 30 days
96.25% introduced
Asian ladybeetle
Harmonia axyridis
6,632 observations in the last 30 days
95.75% introduced
House mouse
Mus musculus
87 observations in the last 30 days
95.65% introducedCommon pheasant
Phasianus colchicus
734 observations in the last 30 days
94.7% introducedDomestic duck
Anas platyrhynchos domesticus
620 observations in the last 30 days
94.22% introducedYak
Bos grunniens
Nine observations in the last 30 days
94.17% introduced
Domestic dog
Canis lupus familiaris
358 observations in the last 30 days
92.32% introduced
Nutria
Myocastor coypus
347 observations in the last 30 days
88.73% introduced
Egyptian goose
Alopochen aegyptiaca
820 observations in the last 30 days
84.53% introduced
Domestic goat
Capra hircus
145 observations in the last 30 days
83.16% introduced
Llama
Lama glama
Ten observations in the last 30 days
82.96% introducedEuropean rabbit
Oryctolagus cuniculus
500 observations in the last 30 days
81.04% introduced
European honey bee
Apis mellifera
4,619 observations in the last 30 days
80.36% introduced
Domestic house spider
Tegenaria domestica
82 observations in the last 30 days
77.74% introduced
European paper wasp
Polistes dominula
436 observations in the last 30 days
74.64% introduced
Arion
Arion species
463 observations in the last 30 days
73.9% introduced
Common earthworm
Lumbricus terrestris
68 observations in the last 30 days
69.82% introduced
Common pill woodlouse
Armadillidium vulgare
1,520 observations in the last 30 days
69.75% introducedRock dove
Columba livia
3,372 observations in the last 30 days
67.22% introduced
Madagascar giant day gecko
Phelsuma grandis
31 observations in the last 30 days
65.38% introduced
Indian peafowl
Pavo cristatus
402 observations in the last 30 days
61.42% introduced
Garden snail
Cornu aspersum
1,654 observations in the last 30 days
56.11% introducedShore crab
Carcinus maenas
407 observations in the last 30 days
53.45% introduced
Bathroom moth midge
Clogmia albipunctata
557 observations in the last 30 days
52.2% introduced
Leopard slug
Limax maximus
697 observations in the last 30 days
50.48% introduced
Common green bottle fly
Lucilia sericata
90 observations in the last 30 days
48.87% introduced
Eurasian collared dove
Streptopelia decaocto
1,090 observations in the last 30 days
47.31% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
45.61% introduced
Housefly
Musca domestica
45 observations in the last 30 days
45.45% introduced
Common striped woodlouse
Philoscia muscorum
350 observations in the last 30 days
40% introduced
Seven-spot ladybird
Coccinella septempunctata
2,740 observations in the last 30 days
37.36% introduced
Domestic guinea pig
Cavia porcellus
15 observations in the last 30 days
36.49% introduced
European garden spider
Araneus diadematus
2,981 observations in the last 30 days
35.14% introduced
Grove snail
Cepaea nemoralis
1,338 observations in the last 30 days
34.64% introduced
Common leopard gecko
Eublepharis macularius
Five observations in the last 30 days
33.96% introduced
European hornet
Vespa crabro
1,626 observations in the last 30 days
27.67% introduced
Dromedary
Camelus dromedarius
20 observations in the last 30 days
26.65% introducedSickle-bearing bush cricket
Phaneroptera species
463 observations in the last 30 days
24.25% introduced
Buff-tailed bumblebee
Bombus terrestris
299 observations in the last 30 days
22.68% introduced
Common crab spider
Xysticus cristatus
Eight observations in the last 30 days
22.58% introduced
Mute swan
Cygnus olor
1,626 observations in the last 30 days
21.96% introduced
Superworm
Zophobas atratus
11 observations in the last 30 days
21.7% introduced
Yellow mealworm beetle
Tenebrio molitor
One observation in the last 30 days
21.6% introduced
Human flea
Pulex irritans
Five observations in the last 30 days
20% introduced
Crane fly
Tipula species
407 observations in the last 30 days
16.24% introduced
Brown-tail moth
Euproctis chrysorrhoea
Seven observations in the last 30 days
15.96% introduced
Devil's coach-horse beetle
Ocypus olens
350 observations in the last 30 days
13.59% introduced
Canada goose
Branta canadensis
2,762 observations in the last 30 days
13.56% introduced
Common wasp
Vespula vulgaris
295 observations in the last 30 days
9.87% introduced
Garden banded snail
Cepaea hortensis
305 observations in the last 30 days
8.46% introduced
Mallard
Anas platyrhynchos
4,581 observations in the last 30 days
8.45% introduced
Roman snail
Helix pomatia
285 observations in the last 30 days
5.7% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Firebug
Pyrrhocoris apterus
948 observations in the last 30 days
4.58% introduced
Domestic silk moth
Bombyx mori
No observations in the last 30 days
4.55% introduced
Monarch butterfly
Danaus plexippus
6,133 observations in the last 30 days
3.54% introduced
Two-spot ladybird
Adalia bipunctata
535 observations in the last 30 days
3.4% introduced
Desert locust
Schistocerca gregaria
Ten observations in the last 30 days
2.29% introduced
Drugstore beetle
Stegobium paniceum
Ten observations in the last 30 days
2.25% introduced
Two-spotted cricket
Gryllus bimaculatus
216 observations in the last 30 days
2.04% introduced
Corn snake
Pantherophis guttatus
107 observations in the last 30 days
1.74% introduced
Flesh fly
Sarcophaga species
17 observations in the last 30 days
1.24% introduced
Great house spider
Eratigena atrica
132 observations in the last 30 days
1.04% introduced
Sahara frog
Pelophylax saharicus
17 observations in the last 30 days
0.74% introduced
Dubia roach
Blaptica dubia
Six observations in the last 30 days
0.73% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
627 observations in the last 30 days
0.54% introduced
Bactrian camel
Camelus bactrianus
Four observations in the last 30 days
0.43% introducedPicnic beetle
Glischrochilus quadrisignatus
13 observations in the last 30 days
0.27% introduced
Sac spider
Clubiona species
17 observations in the last 30 days
0.17% introduced
Garden bumblebee
Bombus hortorum
27 observations in the last 30 days
0.11% introduced
Rook
Corvus frugilegus
808 observations in the last 30 days
0.05% introduced
Sand lizard
Lacerta agilis
75 observations in the last 30 days
0.04% introduced
Forest cockroach
Planuncus tingitanus sensu lato
149 observations in the last 30 days
0.04% introduced