Rhinocycle - two mountain bikes welded together to form a four-wheeled beast - is set to travel the country again.
Croydon Green Party member Andy Lindsay came up with the idea as a way to promote the ancient, threatened animals.
Last year he rode the bike in towns and cities across the UK but this year he is going a bit further.
He said: "I had a really good time doing it with the volunteers last summer. It is hard work but it's character building and the cause is very worthwhile."
The western black rhino was declared extinct in 2006 and there are just four northern white rhinos, less than 50 Javan and 260 Sumatran rhinos left in the world today.
READ THE ENTIRE ARTICLE HERE.