Bat mounts

Bat mounts were first added to World of Warcraft with the Warlords of Draenor expansion with the Armored Bloodwing, shop mount with more bat mounts being added in Battle for Azeroth.

Achievement

 * Rampart Screecher is a reward for Glory of the Nathria Raider.

Vendor

 * Bloodthirsty Dreadwing is bought from Provisioner Mukra in Zuldazar for.
 * Silvertip Dredwing

Quest

 * War-Torn Reins of the Undercity Plaguebat was a reward from Killer Queen during the War of the Thorns world event.

Drops

 * Bloodgorged Hunter drops from Island Expeditions.
 * Witherbark Direwing drops from Nimar the Slayer in Arathi Highlands.
 * Horrid Dredwing drops from Harika the Horrid in Revendreth.

Unobtainable

 * Armored Bloodwing was purchased from the Blizzard Shop or the In-Game Store.

Troll druid Travel Form
Druid Travel Form functions the same as a mount, and the flight form of the Troll race is a bat form.