Washte Pawne can be found in the south Barrens, in the area north of Razorfen Kraul and Razorfen Downs. He can spawn on either side of the road, he has a rather quick respawn rate and he has a 100% chance of dropping the feather that starts this quest.. For the hunters out there, he's level 25, he's got a dark red skin, and he comes with lightning breath 3.

There are four named beasts throughout the Barrens that drop quest-starting items. All of the quests are turned in at Jorn Skyseer in Camp Taurajo.

Here's a consolidated list:
https://vanillawowdb.com/?quest=885 Washte Pawne - red wind serpent (wandering Blackthorn Ridge for me)
https://vanillawowdb.com/?quest=884 Owatanka - blue thunder lizard directly south of Camp Taurajo
https://vanillawowdb.com/?quest=883 Lakota'mani - grey kodo (46,49 for me, typically wanders east of Agama'gor)
https://vanillawowdb.com/?quest=897 The Harvester - blue/black silithid insect (found toward the back of the western Field of Giants area)

There is NO permanent stat buff. This is strictly EXP. All of these mobs are non-elite.

In order of rarity:

Owatanka: ~48,59 or 50, 53
https://vanillawowdb.com/?quest=884 https://vanillawowdb.com/?quest=884
Almost ALWAYS by the tree around 48,59, unless he was killed recently. There have also apparently been some reports he was found at 50, 53. Blue version of a Stormsnout.

Lakota'mani: ~45,49
https://vanillawowdb.com/?quest=883 https://vanillawowdb.com/?quest=883
He might have a pretty broad spawn radius. As of today he was at the above location. This guy is only a tad rare than Owatanka. Large grey kodo that is not aggressive.

Washte Pawne: Ranges 44,74 to 44,78 or 47,49
https://vanillawowdb.com/?quest=885 https://vanillawowdb.com/?quest=885
Coords vary in the boar area (where I usually find him); sometimes spawns across the field at 47,49 area. Contrary to the prior two, I am sometimes unable to find him, so you might have to come back later. Larger, red version of a Thunderhawk.

The Harvester: ~48,70
https://vanillawowdb.com/?quest=897 https://vanillawowdb.com/?quest=897
Spawns little beetles at a fast rate, so if you're not an AOE class you need to DPS him down fast (bring a healing potion). This is one of the few that I have not finished on ALL of my characters, as he is rather rare. Check in the field to the east every time you pass by... it's a small area / not a huge detour. The mob looks like a beetle (unique to zone). I haven't confirmed, but the scorpion that moves extremely fast around the area might be his placeholder.

- Findecano