Blizzard has revealed that the special monthly reward for completing the Trader's Log in May 2023 is the Savage Green Battle Turtle mount!
This Month’s Bonus Reward Mount- Savage Green Battle Turtle Complete activities to fill the bar at the top of the Traveler’s Log found in the Adventure Guide (Shift-J)***, and you’ll receive this month’s bonus reward— the Savage Green Battle Turtle Mount.. Read more on wowhead.com