What you’re looking at above isn’t dead leaves, but rather real camouflaged insects. To be more specific, they’re known as the “dying leaf-mimic katydid”. This species in startle display showing false eyespots on wings. This leaf-mimic katydid resembles a dead or diseased leaf at rest to protect itself from the predators. There’s also the dead leaf butterfly, praying mantis, and the green Phylliidae.
Official Source: http://www.youtube.com/watch?v=os6HD-sCRn8#t=0