Rail bridge and Birch tree
Introduction
The photograph on this page of Rail bridge and Birch tree by Ann Harrison as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk
Image: © Ann Harrison Taken: 2 Apr 2008
From a distance the dark clumps on the tree look like birds nests. They are an example of Witch's Broom, which is common on this type of tree. It's like a growth or deformity, caused by a fungus and found on the downy Birch tree.