From level 3 onwards, rhinos can smash rocks, making them indestructible to anything apart from side walls and centre rocks. Rhinos are extremely useful at any distance in Jungle due to their invincibility and their increased speed, particularly later on when the player is moving especially fast as they can carry the player almost 1000m.
Rhinos with the ending 'ceros' were inconsistently spelt. The only correct example of this was in 'Dhinoceros', with the suffix being spelt correctly with the 'o'. The other two ('Skynocerus' and 'Slimenocerus') were spelt incorrectly with a 'u' in the suffix.
This was corrected in version 1.12.1 on the 14th of November 2017.