Piss plants came from canaries that wanted to stay on the ground and photosynthesize. The foot branched out into roots and they grew really big. They keep their mouth to eat anything that flies by. Their wings became branches in which they can still fly away if they don’t like the spot they are in and land to rebury their roots in the ground, They can also use the branches to slap predators. To support itself it has calcified bones in a similar manner to how the beak came to be, the skeletal structure consists of a big bone rod in the centre with another 2 for the root leg and 5 bone rods in each wing.