DELAWARE VALLEY ORNITHOLOGICAL CLUB. 33 



to say, but certain it is that there are a large number to-day, 

 and probably many that have not yet come to our notice. 



■Whether this indicates a breaking-up of the larger roosts on 

 account of molestation is a question that we are not prepared to 

 solve, since there does not seem to be any data available to show 

 whether any of the roosts have suffered diminution or not. 

 Certain it is that we have secured evidence of Crows roosting 

 to-day in small companies or singly in various places, but here 

 again we cannot say but that investigations such as we have 

 made, if carried on fifty or a hundred years ago, would have 

 brought to light similar conditions. 



In collecting the data here presented there were two objects 

 in view; first, to ascertain the location and any interesting facts 

 relating to Crow-roosts and, secondly, to learn the direction of 

 evening flight at as many points as possible. In most neigh- 

 borhoods there is within a few miles a regular line of flight 

 which the Crows travel night after night and year after year in 

 seeking their winter roosting-place, following an invisible path- 

 way that takes them always across the same field and frequently 

 indeed over the same fence panel with almost mathematical 

 precision. 



Arrows showing the evening flight-lines at various points 

 would, when plotted on a map, obviously point to the various 

 roosts and give some idea of the country which each one 

 "drained." This was the plan which we had in view and the 

 accompanying map shows its realization so far as a part of the 

 country studied is concerned. Other roosts and flight-lines 

 which are tributary to them are described beyond. We may 

 note as a point of interest that there seem to be no roosts in the 

 pine-barren region of New Jersey, all the roosts in that state 

 being in the Delaware Valley region west of the barrens. 



To the many correspondents who have aided in compiling 

 this data the writer would express his indebtedness. 



DESCRIPTION OF ROOSTS REPRESENTED ON THE ACCOMPANYING MAP. 



1. Merchantville, Camden Co., N. J. 



This is the nearest roost to Philadelphia and has for years 

 existed in oak and chestnut woodland near Merchantville, a few 



