The Abri du Lagopède or Ptarmigan shelter is one of the cavities of the Arcy-sur-Cure cave site, in the French department of Yonne, in the Bourgogne-Franche-Comté region. Despite the leaching due to erosion following the collapse of the porch, the shelter remains an interesting Magdalenian deposit.

The shelter is one of the caves of Arcy-sur-Cure that sheltered a human occupation. The Magdalenians used the Ptarmigan shelter between about 12,600 and 11,600 years BP, and established homes there over about 400 years between about 12,100 and 11,700 years BP.

The first signs of human frequentation are stone cutting in layer D, at a depth between 0.60 and 0.53 cm; The concentration of flint chips is highest between -0.76 cm and -0.53 cm. The first passage of the Magdalenians in this shelter is relatively short, and leaves vestiges only on about 25 cm²: a small pile of lithic products resulting from the cutting of a single nucleus, with the fragments left on the spot and the blades carried away. Apart from a small polisher a little out of the way, these remains are the only ones left in this layer. This layer does not include a focus.

The remains of human industry of layer C cover about 6 m². They include a hearth, more precisely in layer C3 which corresponds to the period just after the great steppes of the Dryas cold maximum.

With the caves of the Reindeer and the Wolf, also discovered relatively recently and whose excavations have also followed a rigorous technique, the shelter of the Ptarmigan shows the organization of the space for successive occupations: flattened floors, living space regularly cleaned; Debris discharged outside forms a major landfill.

The climate of the period of human occupation of the shelter is wet and cold.