At the top of the Ridgeland Tower is a man called Branli who is obsessed with bird-men. He wants you to show him how far you can glide and charges you 20 rupees for logging it. How far do you need to fly and what do you get for completing the bird man research quest for Branli in Breath of the Wild?
You will need quite a bit of stamina and likely the Revalis Gale power to get this as you need to travel a minimum of 600 meters to get a prize and over 1000 meters to get a decent reward. Even at that, it isn't worth working for. Unless you already have lots of stamina, I wouldn't bother with this birdman research challenge.
Travelling 600 + meters = 100 Rupees
Travelling 1000 + meters = Fire arrows and food that enhances stamina.
Overall it isn't too exciting. Not bad getting an 80 Rupee profit, but not worth grinding for.
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