Reference article
Brown Tufted Duck’s Race
Brown Tufted Duck offers this race in Grassland.
Entering
Click the local rival and select a duck. You need Running level 10.
Course
Running. Ordinary races play automatically; trained skills and sufficient energy determine whether the duck reaches the finish.
Winning
Winning gives you 50 coins the first time you finish first. Once defeated, this rival no longer offers the race.
Progression
Winning supplies the invitation for 
Grassland Tournament.
Rival
This race is offered by 
Brown Tufted Duck.
Original Flash note
Some races give different coin rewards in the original Flash game.