Do Onions Feel the Cold?

I wondered, because when I put them in a few weeks ago, they where in lines. I tucked them in under fleece. Anchored the fleece down with tent pegs so it wouldn't take off and the cats couldn't get underneath it!

Today I uncovered them as I thought they would need a good water and they have moved???

See, they have all snuggled up together? I am really puzzled?

Have they grown legs and moved?

Has something moved them?

Are they Aliens?

Answers please......