16 



PROCEEDINGS OF THE 



Investigation along a line of flight leading to North Wood- 

 bury, N. J. , showed that the birds passed through three distinct 

 stages of flocking. From the accompanying plan of the roost 

 the movements of the Grackles can be easily traced. 



P. G. Primary gathering at Collingswood, six 



miles from K. 

 S. G. Secondary gathering at Westville, one mile 



from R. 

 F. G. Final gathering, 100 yards from R. 



E. Eoost at North Woodbury. 

 S. E. Eoost occupied by Grackles, about Oct. 1, 



one mile from R. 



/// 



GENEEAL PLAN OF GEACKLE EOOSTS, 



NORTH WOODBUET, N. J. 



Showing formation of one line of flight. 



At 5 p. m., August 8th, a small flock was located feeding near 

 Newton Lake, Collingswood (P. G.). At 5.15 they flew to 

 nearby trees, and after a short concert took wing, flying south- 

 west. This line was followed as opportunity presented. On 

 August 15th, at a point three miles southwest of P. G., about 



