How to unlock: Speak with the biologist [Voeld: Techiix].
Here you can find the guide for The Lost Song quest. This is one of the Heleus Assignments (side quests) in Mass Effect: Andromeda game. You can start this quest after arriving at Techiix on Voeld. In this quest you must deal with poachers that hunt the local creatures cherished by Angara. You must find their hideout and speak with one of the poachers.
Unlocking the quest
This quest can be unlocked after arriving at Techiix on planet Voeld. Near that location you can find the biologist that has a task for the team - you must track the poachers that hunt yevara and stop them.
Track the poachers
There are a few places, marked by the game, that you must investigate. In one of them you will find the datapad presented in the picture above. From it you can learn the location of poachers' main camp. When you get there you should be careful because the poachers can be found in this area (heavy armored Anarchist is the strongest of them) and, additionally, you can encounter the powerful Eiroch.
Examine the poachers' cave
After the fights you can enter the cave and go to the main den where you can meet Dr. Lekaaret. After listening to his opinion on the studies you can act in one of the two ways - allow the researchers to continue their studies or tell them to stop. Regardless of your choice, the quest is completed.
Rewards for finishing the quest: XP, Andromeda Viability Points.