" X,,'- J JoNlCS, liird Mi<:;r(ition in /o-.vti. 2XX 



caiiic liili'st in spriiii;-, for the most pait. A i;I;nuc ;il tin- iiccoiu- 

 paiiyint;- cliarts and at those of the spriu-^ niij;iatioii, will reveal 

 the fact that the last f;reat iiiovemeiU of the spriiiL!; of iSS6 and 

 18S9 occurred lalei' than that of othei- years, and that the ("irst 

 nioxenient in the fall inii;ration for Ihest- two years is correspond- 

 ingly late. 



A second niownienl occurs about the middle of Sciiti'inher, 

 followed by a rather scattered movement until late in the month 

 or early in October, when anotiier delinite movement occurs. .V 

 middle of ()ctobi'r movement is apparent, hut it is not so well 

 marked as the others, either earlier or later. There is really but 

 one movement in November, but it is often much scattereil. and 

 may occur cillu'r earl\' or late, attordin-; to weather conditions. 

 This movement is marked by a dindnution in the nundxT of 

 the resident birds, as well as of some of the winter residents. 



These later moxi-menls seem to bear no relation to the sprinj:; 

 movement whatever, but are larj;ely inlluenced by the weather. 

 The last movement is manifestly due to weather conditions, the 

 movement bein<; retarded by warm weather, and otcurriui;- only 

 when the next storm sweejis in from tin; north. 



We have seen that certain of the sprin<; ndi;rants may be 

 grouped together as regular migrants at a certain time each year, 

 being always or nearly always found moving together, at a certain 

 time, relative or absolute. No such grouping is possible in the 

 fall migrations. l<",ach s|)ecies seems to suit its own convenience 

 in the mattt-r of its southward journey, ha\ing no regard for any 

 company but its own kind. 



in the spring, the last movement of the sea.son was by far the 

 hirgest in the inunber of species moving at one time, while the 

 first movement was of very few species. The fall movement 

 is just the reverse, but with a very nnich less tendency toward 

 any massing of species at any time. The whole movement is 

 far more scattering and irregular as regards delinite dates of 

 moxement. 



It (-an hardly be said that there are any definite dates of 

 greater activity of movement, as we have seen to be true in 

 spring. In general there might be said to be more birds moving 

 in early September than at any other time, l-'.arly October is 



3" 



