The CUB dataset can be downloaded manually from http://www.vision.caltech.edu/visipedia/CUB-200-2011.html. Alternatively, we can execute the following command to download the dataset:
wget http://www.vision.caltech.edu/visipedia-data/CUB-200-2011/CUB_200_2011.tgz
After downloading the dataset, we can extract it and put it in the data/birds/ directory.
Download the char-CNN-RNN embeddings from this link: https://drive.google.com/open?id=0B3y_msrWZaXLT1BZdVdycDY5TEE.