THE BIRDS OV CORIs^^WALL. 227 



Black-Throated Diver ; a casual winter visitor to the south 

 coast, reported from Portscatho to Mount's Bay; since 1890 not 

 unfrequent at the former station ; breeds commonly, but locally, 

 in Northern Scotland and from the lakes of Scandinavia eastAvard 

 and northward ; in winter met with down the Atlantic coast to 

 the Mediterranean. 



Red-Throated Diver ; a regular winter visitor of fairly 

 common occurrence especially on the south coast, but its numbers 

 fluctuate considerably from year to year ; the commonest of our 

 Cornish divers ; breeds irregaikirly in the Highlands and Islands 

 of Scotland and throughout the Arctic and Sub -arctic regions of 

 Europe, Asia and America ; migrates south to the Mediterranean. 



Great Crested Grebe ; a regular winter visitor, not un- 

 connnon on our south coast ; occasionally occurs in flocks of 

 twelve to fifteen ; more or less a resident in England, Wales, and 

 Ireland, and in steadily increasing numbers. 



Red-Necked Grebe ; a winter visitor occurring annually 

 but in very variable numbers along our south coast ; common in 

 January, 1891, in January, 1895, and in December and January 

 1901-1902 ; breeds in South Norway, Denmark, Holland, and 

 North Germany, as well as to the east and north of that region ; 

 migrates in autumn to the east coast of England in considerable 

 numbers. 



Sclavonian Grebe ; a casual winter visitor of not uncomrnon 

 occurrence in our estuaries and creeks ; very rare at Scilly ; 

 observed in considerable numbers at Padstow earl}^ in 1900; has 

 been recorded for the last four years from creeks of the river 

 Fal ; may be a regular winter visitor ; breeds regularly in Ireland, 

 Scandinavia, and Pussia, and in autumn wanders southward 

 through Europe to the Mediterranean. 



Eared Grebe ; a casual winter visitor, occurring at intervals 

 in most of our estuaries, but most commonly in Helford river and 

 the creeks of the Fal ; breeds in suitable localities throughout 

 Europe from the Baltic southwards, and is abundant in the 

 Mediterranean Basin ; essentially a southern bird. 



Little Grebe; resident, fairly common in suitable localities 

 throughout the county ; abundant by the marshy ponds in the 

 Land's End district ; in the east and middle of the county 

 generally nesting in rushy margins of sluggish streams ; complex 



