TheWoWDBTamed this today in Toghusuq as shown on the map, dude was just laid next to the fire in the middle of the village.
I wanted this good boy very bad so I had basically camped on and off for about 12 hours without seeing him, but obviously a quick look in as I was flying past was how I eventually found him!
I also cleared the village many times to see if I could get him to spawn, I went from 63 to 64 doing nothing but this, with no joy, so I am going to say he is on a fixed timer of about 8 hours.
Rare
Biryuk
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As @Galixe has suggested in an earlier reply, since 10.0.5 or 10.0.7 his spawn point has moved from the centre of the encampment.
To be more specific he is at /way #2023 73.8 56.0 per the map above.
Any idea where this guy spawns once you do a certain story quest?
Details
This roster comes from the current game client's data files, so it is not a complete list of every NPC in the game - older world NPCs that are no longer in the modern client are absent.
Hunter Pet: Hound
Biryuk belongs to the Hound creature family, which Hunters can tame; its pet specialization is Cunning. The Hound diet in the client data: Meat, Fish, Cheese, Bread, Fungus, and Fruit. The Hound family’s own pet skill line (Pet - Hound) teaches 2 abilities:
More Hound
Other creatures in the Hound family. See the whole family.
Community notes from Wowhead · 16 comments
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Level and Map Tracking
The game data tunes Biryuk for levels 30 to 70, Dragonflight content.