On the center:

Spawn at top right volcano sometimes in center (or gigas, their spawns are interchangeable)

*Can also spawn top left snow biome (usually left side under cliff area near cave or bottom (left) ish area)

*Can also spawn right side of bottom snow (only if the others are blocked usually)

*Doesn’t need, nor should use a trap, get an argy and pick and kill babies, kill then a decent amount out of vision range of the carch then bring it to the carch (drag body), it’ll sniff then eat.

*(wild or tamed rex, paracer, and cerato babies insta 100% worthiness)

(All besides spawns are the same, the island they usually spawn on the volcano, near metal mountain, or on one of the snow mountains (usually blue ob)