167 
NOTES ON THE NESTING OF THE GRASS- 
HOPPER WARBLER IN THE WEST -RIDING. 
H. B. BOOTH, M.B.O.U., F.Z.S. 
In the first place it is necessary to state that I can only speak 
with any degree of authority for the north of a line drawn 
east and west through Wakefield. The Grasshopper Warblei 
is the rarest, and most erratic, of the summer warblers visiting 
this area of the West Riding, and its life history during the 
period it is with us is less known and described than in the 

- 
Photo by] . [J. H. Priestley. 
J 
Grasshopper Warbler’s Nest, July 30th, 1915. 
Young nine days old. 
case of that of any regular summer immigratory bird. I only 
know of one spot in this large area (viz. Austwick Moss) where 
one could expect to find the species with any degree of cer- 
tainty during that period of the year that it spends with us. 
At other places it turns up rarely and unexpectedly, and the 
chosen spot of one season is no guidance that it will ever come 
there again. In stray years—as in I1911—a few more birds 
of these species arrive in the district, but hitherto we have not 
been able to learn very much of its habits and life history, 
during its sojourn with us. 


1916 May 1. 
