Plate 8. 



Left: Nesting tree of bufflehead, Buffalo Lake, Alberta, June S. 1920. The 

 lower hole contained 12 fresh eggs. 



Right. Another nesting tree in the same locality, June 2, 1920. "The 

 photograph shows how far the eggs w-ere below the entrance hole." Both 

 photographs presented by Mr. G. H. Lings. 



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