Use the laminated paper with “Greater one-horned rhino” to find the 5-letter code.

Combine the “Greater one-horned rhino” page with the Safari Park book

Overlap the “Greater One-Horned Rhino” with page 74 in the Safari Park book and the holes in the page will reveal 5 words. The first letter of those 5 words will spell CRANE. CRANE is the code.