At this time of year the sun is quite high in the sky but the leaves on the trees have not yet come out. On sunny days you get a striking and cryptic effect between the light falling on the trees themselves and the shadows they then cast on the ground.
Aso lovely contrasts between branches, blue sky and clouds.
I was struck by the lovely vertical effect made by this oak tree and the ferns growing in the cracks in the bark against the blue sky.