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 cat
Felis catus
953 observations in the last 30 days
100% introducedDomestic horse
Equus ferus caballus
145 observations in the last 30 days
100% introducedCattle
Bos taurus
81 observations in the last 30 days
99.9% introducedGiant African land snail
Lissachatina fulica
255 observations in the last 30 days
99.65% introducedEuropean fallow deer
Dama dama
137 observations in the last 30 days
99.6% introducedBrown anole
Anolis sagrei
1,335 observations in the last 30 days
99.39% introducedAsian ladybeetle
Harmonia axyridis
4,916 observations in the last 30 days
97.2% introducedHouse mouse
Mus musculus
83 observations in the last 30 days
96.35% introducedBrown marmorated stink bug
Halyomorpha halys
1,985 observations in the last 30 days
96% introducedDomestic sheep
Ovis aries
33 observations in the last 30 days
95.65% introducedBox tree moth
Cydalima perspectalis
298 observations in the last 30 days
94.68% introducedDomestic dog
Canis lupus familiaris
285 observations in the last 30 days
94.06% introducedNutria
Myocastor coypus
242 observations in the last 30 days
88.92% introducedLlama
Lama glama
Eight observations in the last 30 days
87.17% introducedDomestic goat
Capra hircus
102 observations in the last 30 days
84.36% introducedEuropean honey bee
Apis mellifera
4,030 observations in the last 30 days
82.27% introducedEgyptian goose
Alopochen aegyptiaca
669 observations in the last 30 days
79.62% introducedEuropean paper wasp
Polistes dominula
565 observations in the last 30 days
78.53% introducedDomestic house spider
Tegenaria domestica
36 observations in the last 30 days
75.6% introducedArion
Arion species
291 observations in the last 30 days
70.81% introducedCommon earthworm
Lumbricus terrestris
39 observations in the last 30 days
68.39% introducedIndian peafowl
Pavo cristatus
241 observations in the last 30 days
65.11% introducedMadagascar giant day gecko
Phelsuma grandis
13 observations in the last 30 days
59.72% introducedCommon pill woodlouse
Armadillidium vulgare
458 observations in the last 30 days
56.97% introducedGarden snail
Cornu aspersum
1,211 observations in the last 30 days
56.18% introducedBathroom moth midge
Clogmia albipunctata
315 observations in the last 30 days
53.31% introducedEurasian collared dove
Streptopelia decaocto
834 observations in the last 30 days
51.45% introducedCommon green bottle fly
Lucilia sericata
50 observations in the last 30 days
48.81% introducedLeopard slug
Limax maximus
556 observations in the last 30 days
47.69% introducedDomestic guinea pig
Cavia porcellus
Seven observations in the last 30 days
46.51% introducedJamaican field cricket
Gryllus assimilis
Six observations in the last 30 days
44.9% introducedHousefly
Musca domestica
56 observations in the last 30 days
42.98% introducedSeven-spot ladybird
Coccinella septempunctata
1,506 observations in the last 30 days
41.81% introducedCommon leopard gecko
Eublepharis macularius
Four observations in the last 30 days
40% introducedEuropean garden spider
Araneus diadematus
2,104 observations in the last 30 days
35.44% introducedGrove snail
Cepaea nemoralis
770 observations in the last 30 days
34.94% introducedEuropean hornet
Vespa crabro
979 observations in the last 30 days
31.94% introducedDromedary
Camelus dromedarius
14 observations in the last 30 days
28.09% introducedCommon striped woodlouse
Philoscia muscorum
214 observations in the last 30 days
26.13% introducedMute swan
Cygnus olor
1,386 observations in the last 30 days
22.58% introducedBrown-tail moth
Euproctis chrysorrhoea
Five observations in the last 30 days
21.06% introducedBuff-tailed bumblebee
Bombus terrestris
249 observations in the last 30 days
18.24% introducedYellow mealworm beetle
Tenebrio molitor
Seven observations in the last 30 days
17.08% introducedSickle-bearing bush cricket
Phaneroptera species
517 observations in the last 30 days
15.51% introducedCommon crab spider
Xysticus cristatus
28 observations in the last 30 days
15.09% introducedCrane fly
Tipula species
270 observations in the last 30 days
14.68% introducedCanada goose
Branta canadensis
2,335 observations in the last 30 days
12.81% introducedDevil's coach-horse beetle
Ocypus olens
383 observations in the last 30 days
12.38% introducedMallard
Anas platyrhynchos
4,237 observations in the last 30 days
9.94% introducedCommon wasp
Vespula vulgaris
379 observations in the last 30 days
7.45% introducedDomestic silk moth
Bombyx mori
No observations in the last 30 days
7.41% introducedGarden banded snail
Cepaea hortensis
216 observations in the last 30 days
7.4% introducedAfrican fat-tailed gecko
Hemitheconyx caudicinctus
Three observations in the last 30 days
7.14% introducedFirebug
Pyrrhocoris apterus
745 observations in the last 30 days
5.53% introducedRoman snail
Helix pomatia
237 observations in the last 30 days
5.23% introducedAlpaca
Vicugna pacos
Five observations in the last 30 days
4.73% introducedMonarch butterfly
Danaus plexippus
3,829 observations in the last 30 days
3.47% introducedTwo-spotted cricket
Gryllus bimaculatus
165 observations in the last 30 days
3.25% introducedDrugstore beetle
Stegobium paniceum
Ten observations in the last 30 days
2.58% introducedDesert locust
Schistocerca gregaria
Four observations in the last 30 days
2.47% introducedTwo-spot ladybird
Adalia bipunctata
696 observations in the last 30 days
1.68% introducedCorn snake
Pantherophis guttatus
78 observations in the last 30 days
0.96% introducedGreat house spider
Eratigena atrica
98 observations in the last 30 days
0.82% introducedHummingbird hawk-moth
Macroglossum stellatarum
481 observations in the last 30 days
0.7% introducedSahara frog
Pelophylax saharicus
Five observations in the last 30 days
0.69% introducedRook
Corvus frugilegus
604 observations in the last 30 days
0.05% introducedSand lizard
Lacerta agilis
55 observations in the last 30 days
0.04% introduced