INSTINCT AND INTELLIGENCE IN BIRDS 85 




Fic. 17. IMPERFECT NEST OF GREAT HERRING GULL, illustrating the beginning 
of a new breeding cycle, when too late to be finished. Chips, grass, and roots have 
been brought to the new site. Great Duck Island, Maine, July 20. 
Of the seventy-seven nests which had seen service in the season, 
eight only contained addled eggs. It was certain that none of the new 
nests, with or without eggs, could ever come to anything, and probably 
most were never finished. They are made to be abandoned, sooner or 
later, with the rise of stronger instincts. A new cycle is begun, but 


Fic. 18. Nest or Guu, illustrating the same tendeney as that shown in Fig. 
17, but where the old nest was “repaired,” or used as a site for the new one. The 
body of a dead chick was worked into this nest, and the old bird was incubating an 
addled egg. July 22. 
