That is a walking stick, perfectly harmless.

That angle makes guessing quite hard.

It is not dragonfly because it would be "bigger" from the back.

From fast glance it looks also like some sort of mosquito.

Its almost like a very thin, small bird, but i'm still guessing insect.

Some sort of moth, a big one?

I believe that is a Plume Moth.

other pictures: http://imgur.com/a/yMfpe