222 THE BIRDS OF CORNWALL. 



White-winged Black Tern ; an accidental visitor, so far 

 only twice recorded for the county, viz., in May, 188'-', from 

 Tresco, Scilly, and in 1887, from Sennen ; probably often over- 

 looked ; nests in central and southern Europe, and winters in 

 Africa, Australia, and New Zealand. 



Whiskered Tern ; an accidental visitor of rare occurrence 

 in England ; a single specimen obtained at Tresco, Scilly, m 

 Aug., 1851 ; breeds in the marshes of south-west Spain, in the 

 Danube swamps, and in north Africa ; a very rare summer and 

 autumn straggler to northern Germany ; in winter occurs at the 

 Cape. 



Gull-billed Tern ; an accidental visitor, very rare in Eng- 

 land ; one example killed near Tresco, May or June, 1852, and 

 another at St. Just, Penzance, in July, 1872 ; breeds abundantly on 

 Spanish sand banks near Cadiz, and on a few spots as far north as 

 the west coast of Denmark ; a bird of unusually wide distribution. 



Sandwich Tern ; a regular summer migrant to Scilly till 

 lately, but for the past few years no nests have been recorded 

 there ; still an autumn straggler along our south coast from 

 Swanpool westwards ; nests in large colonies fi'om Jutland to the 

 Netherlands and sparingly further south ; in winter reaches the 

 Cape on the west, and Natal on the east. 



Roseate Tern; a casual visitor not recorded since 1846, 

 though in 1840 it nested at Scilly; an oceanic and southern 

 species, now merely a straggler to the eastern coasts of the North 

 Sea, though several colonies still breed in favourite spots in the 

 west of France ; breeds in the new world along the east coast 

 from New England to the West Indies and Venezuela. 



Common Tern ; a summer migrant, but more abundant as 

 an autumn visitor; large passing flocks occasionally seen in 

 spring ; breeds sparingly along the coast, and in diminishing 

 numbers at Scilly ; elsewhere is the predominant Tern along the 

 shores of the Channel and on the west side of Great Britain ; is 

 widely distributed in summer on the coasts, rivers, and lakes of 

 Europe and north Africa, as well as in north America ; in win- 

 ter can be traced down the west coast to Cape Colony. 



Arctic Tern ; a summer migrant, and very abundant as a 

 spring and autumn visitor, formerly outnumbered the Common 



