"They are not always reported as humanoid, guys, nor are they all reported as spindly with big heads and large eyes."

So what are the reported alternatives, LH? The problem is coming up with a FEASIBLE alternative - one that would work in evolutionary and biological terms.

And yes, we know that an airliner would appear mircaculous to a native of Borneo etc. But interstellar travel is several orders of magnitude more difficult than powered flight (millions or billions of times more difficult). This doesn't mean that it's impossible, of course, but the airliner/Borneo analogy is always invoked in these types of discussion and I suspect that it doesn't really give the right perspective. I also suspect that an intelligent species might have to survive several thousand years of continuous technological evolution before it could even contemplate something so hard as interstellar travel.