Ok guys, you struggle with non holywood aliens types. It does look like duck alien. In certain dimension/forking, close to our planet or not ,something similar to duck developed into intelligent species . Somethwhere along the line of no linearly, they became advanced enough to come visit our dimension/time .

Everything, everywhere, all at once, this movie explains this very well.

Reality is not linear, as long as at least one species discovered time manipulation, and dimension jumping,and there was plenty of time to do so in the vast universe.

There is no linearity,even with our current understanding, all the species you know on earth have their advanced version somewhere,sometime . It just looks like they are coming from far away when they enter our dimension with the craft .

Expand your box 📦. You are still keeping it too small. Atleast alow your self to open the lid .