Here's a combined post with some of the maps that community members have already posted and a write up on how to obtain the baby moa chick. If anyone wants to add to this or a mod wants to make a guide out of this feel free
OKay Mini-Moa mystery solved
1.) Head straight out of Fort Ranik and enter Regent Valley heading due south to get your Moa egg. You will run into a group of Moa birds. Go to the farthest nest and steal a moa egg by clicking on the nest itself.
2.) Next you'll have to harden the egg shell itself by traveling to Cantha and placing it in the waters of Morning Veil Falls.This area is SW of the Durheim Archives and is the closet out post to the falls itself. One can leave from other areas as well but the Archives is the closet out post.
3.) Next starting from the Ember Light Camp in Tyria travel in a northern direction until you reach the shore line. There you will fight a few drakes and find some volcanic rocks.
Map to rocks
4.) You'll also need a herring which you can obtain from the collector Guhn in Twin Serpent Lakes. Leaving from Riverside province it doesn't take long to reach the collector. You will need 5 Bog scale fins to trade for the herring. The area around Twin Serpent lakes isn't a bad place to farm for the bog scales. One can also try the swampy area just outside of Lion's Arch as well to obtain the Bog scale fins.
5.) Next head to Elona and get nesting material from the collector Mishu. He is located in the Resplendent Makuum and you'll need 5 skree wings for the nesting material. The area inside the Resplendent Makuum is a good place to farm and collect your skree wings.
Map for Collector & Skree Wings
6.) You'll also need some Juni berries. These are obtained by doing the quest " insatiable appetite " in the marga coast by feeding Toma. To pick up this quest leave from the sunspear sanctuary and talk with Chuno when you enter the village.
7.) You'll also need some Honey Comb. This can be obtained by doing the quest " Hunter's Pride " which is given by Hogni Truth seeker in Drakker lake. After completing the quest you are given 3 pcs of honeycomb.
8.) Now head to Gunnar's Hold and enter the norn fighting tournament. Speak with Magi the Bison and fight in the tourney until you face and defeat Zho. You'll be able to easily recognize who he is since he will show up with a Black Moa. Once he is defeated he will give you his journal which contains all the clues needed to make your mini moa chick.
9.) After receiving Zho's journal go to the luxon capital of Cavalon and speak with Captain Juno.
10.) You'll then head into the Gayla Hatchery and find Katherine. Take 50 spirit wood planks, 10 steel and 5 plat to Katherine in Gayla Hatchery to get an incubator kit from her.
11.) The last part will be to head into Sorrow's Furnace and head into the furnace area itself. You'll need to have the quest " Final Assault " equipped as you'll need to blast your way into that area. If you haven't beaten the initial Sorrow Furnace quests you'll have to complete them in-order to continue.Once in the furnace area head toward the walk way where the Rage Binders are at and eventually you will be hit with " Sorrow's Flame " and then your incubator kit will turn into a mini moa chick.
List of items needed for incubator kit - hardened moa egg, nesting material, volcanic rocks, herring, honeycomb, and juni berries.
If you don't have spirit wood planks which are a rare crafting material you can try farming them in the Haiju Lagoon on Shing Island by killing dragon lilly and grasping roots. Dragon moss in other areas will drop these as well. You can also use Schinichiro in Seitung Harbor. He is a artisan who will craft spirit wood planks for 5 wood, 10 glittering dust and 100 gold. He is located in the harbor itself so thee is no need to run anywhere and one only needs to map to that out post.
Here's the end result. Which is a baby black moa chick. It isn't customized to your character either so if you want to pass this on to another you can 8-)
SO FRUSTRATING. 
on Magni
