Bird-Man Research Study
To start the Bird-Man Research Study mini-game, talk to Branli who is at the top of Ridgeland Tower. He will ask you to join him in a contest.
The objective of the mini-game is to glide as far as you can from the top of the Ridgeland Tower. The best way to accomplish this is to have a mostly maxed out stamina wheel (two and-a-half circles).
If you do not have time to max out your stamina wheel, you can also consume food and elixirs to restore your stamina while paragliding. Another way to complete this side quest is by using Revali’s Gale, which is an item that you can get after defeating Windblight Ganon during the Divine Beast Vah Medoh quest. The item will give you an altitude boost at the starting point, which will increase your range.
The best destination for you to reach in order to have the maximum range is on Hyrule Castle. Align yourself towards Hyrule Castle then start paragliding. You can easily pass the 800-meter milestone by paragliding towards the castle.
Completing this mini-game earns you a Silver Rupee.