Trissa hasn't been able to follow the Kakariko Cuccos to their new hiding place and asks you for help.
Quest Location
After you complete Codgers' Quarrel, talk to Trissa at High Spirits Produce in Kakariko Village to start this quest.
Completing the Quest
Sleep in a bed or wait at a campfire until morning, then go southeast from Masakura Shrine to find the Cucco Hideaway cave. In it, you will find many bird eggs. Gather them and give 10 of them to Trissa.
Quest Reward
Trissa gives you 50 rupees, and starts selling bird eggs.