Reference article
Green Flat-Haired Duck
Green Flat-Haired Duck is a local rival who offers a race in City.
Challenge
Speak to this duck in 
City to enter 
Green Flat-Haired Duck’s Race. The entry requirement is Jumping level 50.
Dialogue
I'm organising a deadly race over the city rooftops! You in? Just try not to fall down ok? I won't let you in the race unless you have level 50 jumping
Race guide
See Green Flat-Haired Duck’s Race for the course and rewards.