Peagawks, unlike Gobblers, get stuck at walls & keep running in the same direction. I think Gobblers used to do this but it was later changed. If you kill a Peagawk there's a large chance that their loot falls down into the clouds, but if you pick a feather, then you can run back and wait for it to fall asleep, and do it all over again.
Steps to Reproduce
Try picking a feather of a peacock & have it run into the edge of the world.
Try picking a feather of a peacock & have it run into the edge of the world.