The bird tracks the camera could not see

Bird tracks were visible in the snow—but Kearton’s brother could not get them to show clearly in a photograph. White impressions against a white surface offered too little contrast.

In Wild Life at Home, Richard Kearton describes adding fine sand dyed black to the toe impressions. The brothers then photographed rook and blackbird tracks, reproduced in the book as walking and hopping patterns.^[1]

The plate records real tracks made visible through an intervention. It is not a photograph of untouched snow. That is the revealing part of the image: the method is part of the evidence.