He flutters his wings a bit, getting used to the sensation of them. There's a flurry of movement (and a little undignified squawking) and he manages, quite clumsily, to make it up onto the railing.

Step one complete.

But here he focuses and spreads out his wings, flapping them as he launches off of the railing and onto the deck.

And it fucking works. He bobbles as the surprise gets him, but manages to stay aloft.