5 
Anas obsoura . 
Lake Urabagog, Maine. 
1897. branches it would have been impossible for either man or bird 
May 24. to see so much as one of the eggs either from above or from a 
distance of four feet away in any direction. I have now no 
doubt that nearly all the Black Ducks -which breed about this 
Lake place their nests on islands and this unquestionably is 
to escape danger from the Foxes. 
