I noticed the Black Moa still shows up in Factions, even after I completed the Beak of Darkness quest. Since they are level 20, and also really easy to get to if you've already run through Factions (just outside Aspenwood Gate), it saves alot of time leveling pets on Heros. Also noteworthy, you don't have to be level 20 to charm a level 20 pet. I charmed a Black Moa with a level 4 Koss W/R setup.
Side note, the pet tamer and his friends outside of the Sunspear Great Hall will run away from you if you have a Black Moa in your party. I guess they are scared of Black Moas. He will eventually stop running and tame your pet, you just have to catch up to him.
Here is a small screenie of my Black Moa Army!
