History of Birdfeeder

Birdfeeder is a lighthearted triumph: feed four groups of pigeons for Saint-14 ("Progress 0/4"). Search results list it among the Monument of Triumph challenges.

How to complete

1. Go to the hangar in the Tower where Saint-14 stands.
2. Walk up to each pigeon group until an icon appears, then interact to "Feed the Birds".
3. The four groups sit around Saint-14's ship: front-left, front-right, behind the ship near the toolboxes (per Nerdschalk), and at the far left of the hangar (ProGameTalk and Nerdschalk agree). Sweep the whole hangar.
4. No combat, gear, power level or quests are needed; it takes a minute or two.

Reward

ProGameTalk says to return to the Tent vendors to claim 10 Legendary Marks. Nerdschalk only says it counts toward event progress, so the exact reward is slightly unclear.