Not a dandelion

On the dandelion theme I went out this afternoon to take a picture of a dandelion with an ANZAC poppy as a backdrop (It's Anzac Day here in NZ, where we remember the fallen in wars) Thought the red backdrop would go well with the dandelion seed heads. As I went to take the picture the two 'leaves' that had been on the dandelion stalk for the last two days started moving. Imagine my surprise!
Have never seen one of these things before and I have no idea what it is but it just jumped out at me as my blip for today.