Caltech-UCSD Birds-200-2011 (CUB-200-2011) is an extended version of the CUB-200 dataset, with roughly double the number of images per class and new part location annotations. For detailed information about the dataset, please see the technical report linked below.

- Number of categories: 200
- Number of images: 11,788
- Annotations per image: 15 Part Locations, 312 Binary Attributes, 1 Bounding Box