Call function from array without it being static

I have an array that holds a list of functions, however my code wont let me call those functions without them being static classes, which I do not want.

I'm a novice and haven't done a lot of code with delegates and I'm not fully aware of where I went wrong or how to work around / fix it.

Constructor:

 delegate void ActFunc();
 private ActFunc[] actionFunctions = {CallMoveObject, CallScreamAttack};

Where it calls from:

     for(int i = 0; i < actionValues.Length; i++){
         if( r >= actionValues[i] ){
             actionFunctions[i]();
             break;
         }
     }

Error from unity:

 error CS0236: A field initializer cannot reference the nonstatic field, method, or property 'RockGolem.CallMoveObject()'

Thanks for the help!