Buy RS3 Acadia birdhouse
The Acadia birdhouse is a members-only item in RuneScape 3 used to train Hunter in Havenhythe. You place it in a birdhouse plot, add two seeds, and wait 45 seconds while it fills with birds. Emptying a full Acadia birdhouse gives 335 Hunter XP. You need level 51 Hunter to set one up.
Each Acadia birdhouse gives 4 raw bird meat and feathers in amounts of 12, 16, 20, or 24. It can also give up to three bird's nests, and there is a rare chance to find an oaken key. When you harvest the birdhouse, the clockwork inside is returned to you.
Making one yourself takes level 50 Crafting and level 10 Fletching, plus one acadia log and one clockwork. Buying the item skips that step so you can train right away.
Havenhythe has 8 birdhouse plots. A full lap takes about 3 minutes, which means around 160 birdhouses per hour. At that rate, Acadia birdhouses give about 116 nests and 2,880 feathers per hour. This is a passive and simple way to gain Hunter XP while stocking up on nests and feathers.