INTRODUCTION. 



XXXIX 



necked Phalarope, Kentish Dotterel, Sabine's Gull. The 

 Mute Swan may also be added to the residents, making a 

 total of 275. 



The species excluded from the Norfolk list are : Pallas' s 

 Shrike, Grey-headed Yellow Wagtail, Red-barred Crossbill 

 (L. rubifasciata), Eagle Owl, Pelican, Great White Heron, 

 Little Egret, Buff-backed Heron, Canada Goose, Egyptian 

 Goose, Harlequin Duck, Rock Dove, Hooded Merganser, 

 Virginian Colin, Green-backed Gallinule, Cream-coloured 

 Courser, Eastern Golden Plover, Sabine's Snipe (variety), 

 Wilson's Petrel, Ringed Guillemot (variety), all admitted on 

 insufficient evidence. 



The species which have been added to the Norfolk fauna 

 during the past twenty years include : Siberian Stonechat, 

 Aquatic Warbler, Pallas's Warbler, Yellow-browed Warbler, 

 White Wagtail, Tawny Pipit, Water Pipit, Red-breasted 

 Flycatcher, Citril Finch, Holboell's Redpoll, Northern or 

 Russian Bullfinch, Two-barred Crossbill, Yellow-breasted 

 Bunting, Great Spotted Cuckoo, Flamingo, Lesser White- 

 fronted Goose, Ruddy Sheld-duck, King Eider, Allen's Gal- 

 linule, Caspian Plover, Siberian Pectoral Sandpiper, Sooty 

 Tern, Mediterranean Herring Gull, White-billed Northern 

 Diver, Great Shearwater. 



A comparison of the three avifaunas based upon a careful 

 analysis in accordance with the faunistic definitions given on 

 page xxxvii yields the following results : 



RESIDENTS 

 SUMMER VISITANTS 



WINTER VISITANTS 

 BIRDS OF PASSAGE 

 OCCASIONAL AND ACCIDEN- 

 TAL VISITANTS . 



= ANNUALBREEDERS 



: TOTAL AVIFAUNA. 



C 2 



