Once the nestlings left the cave, I could see their teams displayed on the atlas. With the cave as the centre point I'd instructed them to move off in every direction and as they spread out to reach as far as they could go. So, for every snake I fed my venom, there was a tiny snake figure representing them on the atlas.
There were only 9 hours left for the quest, and at the time they left, I was still waiting on 8 nestlings. The goal for them was to hunt and improve their levels in the remaining time. But what I was really after was the added bonus of messing with Sensei by increasing the scope of the atlas, free of charge.
Even now, the nestlings hadn't gone that far, but already the crappy map was showing the places they had passed in full colour.