福爾摩沙守望計畫Project FormosaWatch
Report
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Collection

Invasive species

Animals that people brought to Taiwan and that now harm its native wildlife, such as the green iguana and the spot-legged tree frog. Their records show where they live and where they are spreading.

Records
1,396
Species named
19
Years
2011–2026
Report an invasive animalView on the map
A green iguana lying along a branch
Green Iguana · Photo: lienyuan lee · CC BY 3.0

What it holds

What counts

Every record whose species TaiCOL, Taiwan's species checklist, tags as an invasive animal, alive or dead and whichever page it was filed on. Nobody ticks a box: it follows the species. A report filed as invasive without a species name is here too, marked “reported as invasive” until someone confirms what it is.

Where else it appears

An invasive animal seen alive is also a wildlife sighting; one found dead or injured is also roadkill. Choose “Seen alive” or “Dead or injured” below to see either.

Locations

The location of a species protected by law or rated sensitive is blurred before it is published, here as everywhere on the site. So is the location of a record nobody has identified yet.

Alive or dead

Newest records

Newest first, by the date each animal was seen. The newest is from Sep 30, 2026; the records here were seen in 2011–2026.

  1. Sep 30, 2026Spot-legged Tree FrogInvasive species
  2. Sep 30, 2026Spot-legged Tree FrogInvasive species
  3. Dec 31, 2017Rock PigeonRoadkill
  4. Dec 31, 2017Domestic DogRoadkill
  5. Dec 31, 2017Domestic CatRoadkill
  6. Dec 30, 2017Domestic CatRoadkill
  7. Dec 28, 2017Domestic CatRoadkill
  8. Dec 27, 2017Domestic CatRoadkill
See all 1,396 records as a list

Imported from open data shared through GBIF: 1,394. Filed on this site: 2.

Invasive animals in Taiwan

Every animal TaiCOL tags as invasive: 209 species and subspecies, under the names TaiCOL accepts. The counts are records in this collection.

TaiCOL includes the domestic cat and the dog, citing Ho et al. (2024, 2025) and the Global Invasive Species Database. We follow TaiCOL, so records of cats and dogs are in this collection.

209 animals, grouped below.

Birds33 species

Reptiles12 species

Amphibians6 species

Mammals3 species

Fish42 species

Insects63 species

Snails, slugs and shellfish30 species

Crustaceans12 species

Spiders and mites5 species

Other animals3 species