Crow's nest

Most of London is suffering from the pollen of plane trees. It gathers in great clumps in the gutters then blows around getting into the throat or eyes. Cycling or just walking is an act of faith being half blinded by dust and tears...
But not pollen from this one. Maybe the shock of pruning set it back. It has a solitary leaf and one crow sitting in its nest.

The bird on the egg
the egg in the nest
the nest in the twig
the twig on the branch
the branch on a limb
the limb in the tree
the tree in a hole
the hole in the bog
and the bog down in the valley oh...