Skylarks

Up on the hills yesterday the skylarks were warming up - not quite at full throlttle yet, but definitely on their way. Much of the snow has cleared - although there are still some deep drifts.

I wondered, as they shot up singing into the sky, what did they do when everything was covered in a thick blanket of snow? Do they hide underneath it, cosy amongst the heather (which would be a bit like sitting underneath rhododendron bushes) or did they escape to the wooded areas nearby and sit in the bushes and the trees?

Anyone have any idea?