Empty nest

My son came upon this fragile sphere of grass while he was tackling a bramble patch. We thought it might belong to a mouse but now I'm inclined to think it may have been a wren's nest. It was not inhabited.

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Several comments on yesterday's blip speculated as to the position  I had adopted in order to photograph the dog Breeze. Son has kindly provided the answer here. What one does for a shot!