PREFACE. xi 



Middlesex,' and the ' Birds of Norfolk.' I now am 

 pleased to be able to add to the list the 'Birds 

 of Berkshire and Buckinghamshire.' I trust that, 

 ere long, we shall be presented with accounts of 

 the Avi-fauna of many other counties, and that 

 our labour, by being thus divided, will be found 

 more perfectly executed. 



Although I have closely adhered to the nomencla- 

 ture of Yarrell in the following pages, I have availed 

 myself of a method similar to that proposed by 

 the editor of the Zoologist, Mr. Edward Newman, 

 in an appendix to the ' Letters of Rusticus on 

 Natural History,' and one which, I think, if more 

 generally adopted by Ornithologists, would do much 

 towards helping a stranger to form a general idea 

 of the Birds of a particular district. 



I have accordingly classed my birds under five 

 heads : — 



Residents. 



Summer Visitors. 



Winter Visitors. 



Spring and Antiimn Visitors, being the species 



