Greater one-horned rhino

Series 3

Thick, armour-plated skin: Hugh thick skinned armour-plated bulldozers,

Surprisingly quick and nimble: with a surprisingly quick top speed of 30 miles an hour,
Bad tempered and aggressive: combined with a quick tempered and aggressive nature,

making the Greater one-horned rhino defiantly deadly.

References:
Series 3: episode 12. Nepal