Dog Lichen, & Trees That Walk

We have a walk through a wooded nature reserve, got lost and wandered for a while, and then found our way back.

Along the way I saw these lichen, called Dog Lichen because of the teeth-like spikes on the underside (to help the Lichen to grip the ground apparently). 

My extra is of two remarkable trees holding hands and going for a walk. And we also saw two Osprey circling above and seeing off a buzzard.