Masteria Expansions, Names and the proof for each

But Lukas seems to know about them, and said they nested on the mountainside, and he's from 1000 years ago.

A fair portion of birds tend to migrate at specific points in the year.
You might see a change or two in the monsters grounds in a different area.
Since Krakia is set to take place somewhere in the middle of a jungle, and following a set path of migration, you might not see eggs in the other map. All of thats pending if they reuse them.

Its also a very simple method of not having to come up with another monster.

Any ideas over what happened to Lukas?
He says he saw a flash of light, but was he teleported away from the keep before it was destroyed/taken over?