What the frick is with these planes?

Has anyone else in the Brisbane or Australia area seen these big ass friggin' plane battleships flying around?

They're like planes, but way bigger (Also possibly an illusion because of the clouds and it is dark and I get paranoid when it is dark)

And I couldn't get any photos of them because every time I saw one I was like, "Holy Jesus, is this world war three?!" It's probably no... seems unlikely


Also I bought a FitBit (fancy pedometer, with crazy features and such) and I did over 12000 steps today! So proud of myself.