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Invasive species - American bullfrog (Lithobates catesbeianus) in Flanders, Belgium (post 2018)
Devisscher S, Brosens D (2023). Invasive species - American bullfrog (Lithobates catesbeianus) in Flanders, Belgium (post 2018). Version 1.5. Research Institute for Nature and Forest (INBO). Occurrence dataset.

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Availability: CC0 To the extent possible under law, the person who associated CC0 with this dataset has waived all copyright and related or neighboring rights to this dataset.

Invasive species - American bullfrog (Lithobates catesbeianus) in Flanders, Belgium (Post 2018) is a species occurrence dataset published by the Research Institute for Nature and Forest (INBO). The dataset contains over 24600 occurrences (40 % of which are American bullfrogs) sampled between 2019 until now, in the months April to October. more

The occurrences were collected through fieldwork and the framework of bullfrog management. Captured bullfrogs were almost always removed from the environment and humanely killed, while the other occurrences are recorded bycatch, which were released upon catch (see bibliography for detailed descriptions of the methods). Therefore, caution is advised when using these data for trend analysis, distribution range calculation, or other. Issues with the dataset can be reported at

We strongly believe an open attitude is essential for tackling the IAS problem (Groom et al. 2015). To allow anyone to use this dataset, we have released the data to the public domain under a Creative Commons Zero waiver ( We would appreciate it however if you read and follow these norms for data use ( and provide a link to the original dataset ( whenever possible. If you use these data for a scientific paper, please cite the dataset following the applicable citation norms and/or consider us for co-authorship. We are always interested to know how you have used or visualized the data, or to provide more information, so please contact us via the contact information provided in the metadata, or

Data from 2010 to 2018 can be found here:

Biology > Ecology - biodiversity
Fresh water, Terrestrial, Alien species, Amphibians, Capture of animals, Eradication, Invasive species, Management, Belgium, Flanders,

Geographical coverage
Belgium, Flanders [Marine Regions]

Temporal coverage
7 May 2019 - 1 January 2022

Taxonomic coverage
Lithobates catesbeianus

Occurrence of biota

Vlaamse overheid; Beleidsdomein Omgeving; Instituut voor Natuur- en Bosonderzoek (INBO), moredata creator

Dataset status: Completed
Data type: Data products
Data origin: Research: field survey
Metadatarecord created: 2023-10-16
Information last updated: 2023-10-16
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy