For more information about this cache series, see here.
SHAPESHIFTING
You may struggle to get the information you need with this picture, so I have also provided a downloadable version. This version comes with an ALERT: as with all downloadable files you do so at your own risk; while Team Otago vouches for the file's safety, it has not been checked by GCHQ or a reviewer for possible malicious software.
Downloadable version