GRASSHOPPER WARBLER. 95 



calculated from a series of ten years' records, was the 3oth 

 of April, but in the Knaresborough and Harrogate district 

 the average time is the i8th ; in Cleveland it does not, as 

 a rule, makes its presence known until the end of the month. 

 It departs in August and onward to mid-September. 



It is thinly distributed, local, and varying in numbers 

 in different seasons. Near Sheffield there are generally 

 a few pairs in the wooded districts ; in the Barnsley area 

 it occurs regularly, and nests annually within seven or eight 

 miles of Halifax ; at Liversedge it has been noted twice, 

 in 1895 and 1896 ; in the neighbourhood of Huddersfield 

 it breeds in several localities, and is fairly common at Storthes 

 Hall and Skelmanthorpe ; at Almondbury it is not numerous, 

 yet a regular visitant ; near Wakefield there are one or two 

 places where it is found nesting ; in the Aire Valley it has 

 bred near Leeds, at Roundhay Park, and at Adel, though 

 the bird is scarce and irregular in its visits, as it also is near 

 Doncaster, Selby, and Goole ; at Ackworth and Hemsworth 

 it has frequently been known to nest. In the north-west 

 it is reported at Skipton-in-Craven, and in small numbers 

 near Settle, where the eggs were taken on a moor in 1896 ; 

 in Nidderdale it occurs sparingly, as also in the Washburn 

 Valley, and in Upper Wharfedale, being occasionally met 

 with to an altitude of 1000 feet on the Ilkley Moors ; near 

 Pateley Bridge it has twice occurred, the last occasion being 

 in 1886 ; in the Harrogate district it was not uncommon 

 (1879-1885), though it is now very irregular and uncertain ; 

 the same remark is applicable to the Wetherby, Boston Spa, 

 Ripon and Eavestone districts, but at Cowthorpe, Wilstrop, 

 and Askham Bogs it is fairly numerous. In the East Riding 

 it is reported from near Hull and Sproatley in South Holder- 

 ness ; it is scarce and uncertain at Beverley, and has occurred 

 a good many times, but irregularly ; it is rare at Flamborough 

 where one was killed against the lantern during the night 

 migration in 1877, and a nest has been found on the cliff 

 tops. It occurs in most districts of the North Riding, not 

 a common nesting species, yet hardly to be considered very 

 rare ; near Pickering it is perhaps most abundant, and 



