Megafauna in Bestiaries 1 and 2

[Swordteach]

I am looking at the Goliath Druid which limits our wildshape and AC to Megafauna and Dinosaurs.
Primal Bond (Ex): When a goliath druid forms a nature
bond, if she selects a cleric domain, she must selected from
the Animal, Destruction, or Strength domains, or the
Ferocity, Growth, or Rage subdomainsAPG.
If the goliath druid selects an animal companion, she
must select a dinosaur or megafauna. If she has a dinosaur
or megafauna animal companion, she can target it with
enlarge person even though the companion isn’t of the
humanoid type.

Wild Shape (Su): Druids’ ability to wild shape into
a creature of the animal type allows a goliath druid to
assume only the form of a dinosaur or megafauna.

So far I can only find Megafauna in Bestiaries 3 or later. Is there a list that shows what animals in Bestiaries 1 and 2 are considered megafauna? Specifically I am wondering about the Roc, but would also like other options too.

[James Risner]

Roc isn't a megafauna. Yes those started in B3.

[Gray Warden]

Google -> Megafauna Pathfinder

Some of them can also be Animal Companions.

[Jeff Morse]

I have a goliath druid in PFS and have never done any wildshape other than giant. You get to get that dragon armor bonus without having to put wild on it.