This 2022 version of the dataset has two variations:
An abbreviated tiny dataset for image classification of just 2 species with an accompanying
tiny dataset document.
And, a full data version for classification of 6 butterfly species with its own accompanying dataset document.
The Github repository contains everything but the images in the dataset. They full dataset with images is hosted on Kaggle. Follow the link to download the complete dataset, https://www.kaggle.com/datasets/keithpinson/butterfly-mimics-2022.