Did you view the nydus worm in the cutscene editor to see what its animation names are? I hate that we need to do this because in warcraft 3's editor you could view any and all models and animations right in the sidebar really easily.
Edit: And by "always play the same birth animation" you mean you want to eliminate all the other variations in the actor events?
Yep, I want to eliminate all other birth animations except one in the Actor. So the Nydus Worm always spawn with the same animation when it pops out of the ground.
In the Cutscene editor, I found three animations for the nyduscanal.m3 model: Birth, Birth01 and Birth02. I assume those are the names I need to reference in the Actor Event field? But how can I get the Actor to always play the same birth animation?