birder-project/butterflies-moths-austria

Butterflies & Moths Austria

Dataset Summary

This is a repackaged version of the Austria butterflies and moths dataset in PyTorch ImageFolder format.

Note: All credit goes to the original authors.

Compared to the original release, this upload:

• Converts all images to WebP
• Resizes each image so that the total number of pixels < 589,824 (=768×768), preserving aspect ratio
• Pre-splits the dataset into train/validation/test using a 70:20:10 split
• Packs the data in an ImageFolder directory layout

The original dataset contains 541,677 images of 185 butterfly and moth species from Austria. Classes with fewer than 10 total images (6 classes) are placed in a separate misc split, the remaining 179 classes are split into train, validation, and test.

• Dataset: https://figshare.com/s/e79493adf7d26352f0c7
• Paper: https://www.nature.com/articles/s41597-025-05708-z

Citation

@article{Barkmann2025,
         title={Machine learning training data: over 500,000 images of butterflies and moths (Lepidoptera) with species labels},
         author={Barkmann, Friederike and Lindner, Andreas and W{\"u}rflinger, Ronald and H{\"o}ttinger, Helmut and R{\"u}disser, Johannes},
         journal={Scientific Data},
         volume={12},
         number={1},
         pages={1369},
         year={2025},
         doi={10.1038/s41597-025-05708-z},
         url={https://doi.org/10.1038/s41597-025-05708-z},
}