Blackfeather Nester
Source: Drop. There is no fury quite like that of a mother Blackfeather defending her nest. Flying type. You can find the up near the top of the giant tree at At the bottom of the hollow portion there is lootable , then near the edge at the top is a stick.
The 
Blackfeather Nester is a battle pet obtained in The Azure Span during Dragonflight by luring a bird called Pepper Hammer with tree sap and a stick found inside a large fallen tree trunk near Traitor's Rest.
Guide awaiting review
Travel to Traitor's Rest
Head to The Azure Span and find the large fallen tree trunk next to the giant skeleton, east of Iskaara. The tree trunk is at 26.3, 46.34 in The Azure Span.
Collect the Tree Sap
At the bottom of the hollow portion of the fallen tree trunk, click the lootable item inside to receive Tree Sap, which gives you a 5-minute buff.
Click the Stick
Climb to the top of the tree trunk and click the stick near the edge. This uses your Tree Sap buff to lure Pepper Hammer. If the stick is not clickable, type /reload and it should become interactable.
Loot Pepper Hammer
Wait for Pepper Hammer to fly down toward the stick, then click on the bird at 26.52, 46.18 to loot it and receive the Blackfeather Nester pet. Alternatively, if you can reach Pepper Hammer on the right side of the log where she flies, you can click her there to skip collecting the sap and stick entirely.
Tips
See the video guide for the exact location of Pepper Hammer and the tree trunk.
Once you loot Pepper Hammer, the Tree Sap and stick items disappear from the tree trunk.
