Caltech-UCSD Birds-200-2011 (CUB-200-2011)

Warning: Images in this dataset overlap with images in ImageNet. Exercise caution when using networks pretrained with ImageNet (or any network pretrained with images from Flickr) as the test set of CUB may overlap with the training set of the original network.


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.

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

For detailed information about the dataset, please see the technical report linked below.


If you use CUB-200-2011 in your work, please cite the technical report as follows:

	Title = ,
	Author = {Wah, C. and Branson, S. and Welinder, P. and Perona, P. and Belongie, S.},
	Year = {2011}
	Institution = {California Institute of Technology},
	Number = {CNS-TR-2011-001}



Please contact Catherine Wah for questions about the dataset.