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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
390 observations in the last 30 days
100% introduced
Domestic horse
Equus ferus caballus
196 observations in the last 30 days
100% introduced
Domestic cat
Felis catus
1,426 observations in the last 30 days
99.99% introduced
Giant African land snail
Lissachatina fulica
377 observations in the last 30 days
99.55% introduced
Brown anole
Anolis sagrei
2,096 observations in the last 30 days
99.39% introduced
European fallow deer
Dama dama
126 observations in the last 30 days
99.37% introduced
Cattle
Bos taurus
102 observations in the last 30 days
97.39% introduced
Domestic sheep
Ovis aries
94 observations in the last 30 days
97.36% introduced
Brown marmorated stink bug
Halyomorpha halys
925 observations in the last 30 days
96.47% introduced
Box tree moth
Cydalima perspectalis
64 observations in the last 30 days
96.13% introduced
House mouse
Mus musculus
94 observations in the last 30 days
95.76% introduced
Asian ladybeetle
Harmonia axyridis
4,867 observations in the last 30 days
95.24% introducedCommon pheasant
Phasianus colchicus
1,709 observations in the last 30 days
94.68% introducedYak
Bos grunniens
21 observations in the last 30 days
94.62% introduced
Domestic dog
Canis lupus familiaris
475 observations in the last 30 days
93.28% introducedDomestic duck
Anas platyrhynchos domesticus
1,040 observations in the last 30 days
92.83% introduced
Nutria
Myocastor coypus
510 observations in the last 30 days
87.98% introduced
Egyptian goose
Alopochen aegyptiaca
1,521 observations in the last 30 days
86.01% introduced
Domestic goat
Capra hircus
178 observations in the last 30 days
85.92% introduced
Llama
Lama glama
Seven observations in the last 30 days
82.47% introduced
European honey bee
Apis mellifera
4,849 observations in the last 30 days
80.64% introducedEuropean rabbit
Oryctolagus cuniculus
824 observations in the last 30 days
78.97% introduced
Domestic house spider
Tegenaria domestica
89 observations in the last 30 days
76.95% introduced
European paper wasp
Polistes dominula
679 observations in the last 30 days
74.01% introduced
Common pill woodlouse
Armadillidium vulgare
3,065 observations in the last 30 days
73.11% introduced
Arion
Arion species
367 observations in the last 30 days
72.57% introduced
Common earthworm
Lumbricus terrestris
181 observations in the last 30 days
70.23% introduced
Madagascar giant day gecko
Phelsuma grandis
27 observations in the last 30 days
65.78% introducedRock dove
Columba livia
5,248 observations in the last 30 days
61.87% introduced
Indian peafowl
Pavo cristatus
511 observations in the last 30 days
60.22% introduced
Garden snail
Cornu aspersum
2,404 observations in the last 30 days
57.88% introduced
Common green bottle fly
Lucilia sericata
120 observations in the last 30 days
55.43% introduced
Leopard slug
Limax maximus
583 observations in the last 30 days
52.44% introduced
Bathroom moth midge
Clogmia albipunctata
454 observations in the last 30 days
49.45% introduced
Housefly
Musca domestica
47 observations in the last 30 days
46.9% introduced
Eurasian collared dove
Streptopelia decaocto
2,188 observations in the last 30 days
46.04% introduced
Jamaican field cricket
Gryllus assimilis
Five observations in the last 30 days
43.55% introducedShore crab
Carcinus maenas
425 observations in the last 30 days
41.08% introduced
Common striped woodlouse
Philoscia muscorum
798 observations in the last 30 days
37.58% introduced
European garden spider
Araneus diadematus
83 observations in the last 30 days
36.85% introduced
Seven-spot ladybird
Coccinella septempunctata
6,245 observations in the last 30 days
36.4% introduced
Domestic guinea pig
Cavia porcellus
Six observations in the last 30 days
35.93% introduced
Superworm
Zophobas atratus
Eight observations in the last 30 days
35.42% introduced
Grove snail
Cepaea nemoralis
1,716 observations in the last 30 days
33.43% introduced
Common leopard gecko
Eublepharis macularius
Six observations in the last 30 days
31.75% introduced
Buff-tailed bumblebee
Bombus terrestris
816 observations in the last 30 days
29.83% introduced
European hornet
Vespa crabro
345 observations in the last 30 days
28.51% introducedSickle-bearing bush cricket
Phaneroptera species
113 observations in the last 30 days
26.23% introduced
Dromedary
Camelus dromedarius
28 observations in the last 30 days
23.9% introduced
Yellow mealworm beetle
Tenebrio molitor
Four observations in the last 30 days
22.55% introduced
Mute swan
Cygnus olor
2,564 observations in the last 30 days
21.58% introduced
Common crab spider
Xysticus cristatus
12 observations in the last 30 days
21.17% introduced
Human flea
Pulex irritans
Five observations in the last 30 days
20% introduced
Crane fly
Tipula species
497 observations in the last 30 days
17.95% introduced
Devil's coach-horse beetle
Ocypus olens
41 observations in the last 30 days
15.11% introduced
Brown-tail moth
Euproctis chrysorrhoea
162 observations in the last 30 days
14.4% introduced
Canada goose
Branta canadensis
6,373 observations in the last 30 days
13.96% introduced
Common wasp
Vespula vulgaris
364 observations in the last 30 days
11.82% introduced
Domestic silk moth
Bombyx mori
No observations in the last 30 days
7.84% introduced
Garden banded snail
Cepaea hortensis
408 observations in the last 30 days
7.82% introduced
Mallard
Anas platyrhynchos
8,423 observations in the last 30 days
6.44% introduced
Alpaca
Vicugna pacos
No observations in the last 30 days
5.56% introduced
Roman snail
Helix pomatia
811 observations in the last 30 days
5.38% introduced
Two-spot ladybird
Adalia bipunctata
546 observations in the last 30 days
4.63% introduced
Firebug
Pyrrhocoris apterus
2,211 observations in the last 30 days
4.63% introduced
Monarch butterfly
Danaus plexippus
2,473 observations in the last 30 days
4.3% introduced
African fat-tailed gecko
Hemitheconyx caudicinctus
Four observations in the last 30 days
3.7% introduced
Drugstore beetle
Stegobium paniceum
Seven observations in the last 30 days
2.82% introduced
Madagascar hissing cockroach
Gromphadorhina portentosa
Six observations in the last 30 days
2.65% introduced
Flesh fly
Sarcophaga species
11 observations in the last 30 days
2.49% introduced
Desert locust
Schistocerca gregaria
59 observations in the last 30 days
2.2% introduced
Two-spotted cricket
Gryllus bimaculatus
49 observations in the last 30 days
1.88% introduced
Corn snake
Pantherophis guttatus
215 observations in the last 30 days
1.67% introduced
Great house spider
Eratigena atrica
175 observations in the last 30 days
1.22% introduced
Hummingbird hawk-moth
Macroglossum stellatarum
267 observations in the last 30 days
0.64% introduced
Dubia roach
Blaptica dubia
Two observations in the last 30 days
0.63% introduced
Sahara frog
Pelophylax saharicus
38 observations in the last 30 days
0.6% introduced
Bactrian camel
Camelus bactrianus
Two observations in the last 30 days
0.39% introducedPicnic beetle
Glischrochilus quadrisignatus
59 observations in the last 30 days
0.35% introduced
Sac spider
Clubiona species
57 observations in the last 30 days
0.13% introduced
Garden bumblebee
Bombus hortorum
212 observations in the last 30 days
0.1% introduced
Sand lizard
Lacerta agilis
705 observations in the last 30 days
0.05% introduced
Rook
Corvus frugilegus
1,083 observations in the last 30 days
0.04% introduced
Forest cockroach
Planuncus tingitanus sensu lato
Three observations in the last 30 days
0.04% introduced