BIRDS. 49 



when immature birds are not unfrequent at Flamborough. 

 Mr. A. Strickland informed Mr. Allis in 1844 that some 

 few years before it used to breed in considerable numbers 

 on the rocks off Flamborough Head. 



189. Sula bassana (L.). Gannet. 



Periodical visitant, common off the coast, and especially at 

 Flamborough, in the herring season. Has occurred as a 

 straggler very far inland, but the examples so observed have 

 been in immature plumage. 



Order 4. HERODII. 

 Fam. ARDEID.E. 



190. Ardea cinerea L. Common Heron. 



Resident, local, but common. Yorkshire heronries have 

 greatly decreased in number. Those now in existence are 

 at Kildale-in-Cleveland, Newton Hall near Malton, Hare- 

 wood Park near Leeds, Eshton Hall near Gargrave, and 

 Browsholme Hall near Clitheroe. It nests singly and 

 irregularly in many parts of the county. 



It is not uncommon on the coast in the autumn, when 

 immigrants arrive from the continent, and throughout the 

 winter. 



191. Ardea purpurea L. Purple Heron. 



Accidental visitant from Southern Europe and Africa, of very 

 rare occurrence. 



Flamborough, young bird shot in 1833 (Allis). 



Lowthorpe, near Driffield, one, spring of 1847 (Morris, Zool., 



1849, P- 259 1 )- 

 Temple Thorp, near Leeds, male, May 24, 1850 (Morris, B. 



Birds, 1855, iv. 108). 



Ruswarp, near Whitby, one, mature, shot, summer of 1850, 

 in the Whitby Museum (Stephensoa, MS.). 



Hornsea Mere, one, July, 1863, in the collection of Sir H. 

 S. Boynton (T. Boynton, MS.). 

 E 



