That's a kangaroo, formed by formation-flying quadcopters at the Ars Electronica conference in Linz, Austria. (Before you get too excited, these are AscTec Hummingbirds and each one of those "pixels" in the picture cost $5,000). From sUASNews:
Twitter user Eva Shindling @evsccc recently posted a Kangaroo in the sky above Linz, Austria flown as part of the ARS Electronica 2013 festival.
The team from the Ars Electronica Futurelab are doing amazing things with multirotors what will they come up with next!
The show was carried out by AscTec Hummingbird quadrocopters produced by German manufacturer Ascending Technologies. The small electric helicopters, weigh less than 2kg. They have an on-board GPS module, with which they can autonomously find and hold their position. Software developed by Ars Electronica Futurelab commands formation changes. With their small LED bulbs as payload, the quadrocopters can form dynamically any figures in the night sky.