LARID.li. 



621 



THE WHISKERED TERX. 



HVDROCHELIDON HVBRIDA (Pallas). 



The AVhiskered Tern has an even less northerly range than the 

 preceding species, and only wanders to our islands at long intervals. 

 It was first recognized by Heysham, who selected the subject of the 

 above illustration from some sea-birds which had been shot at Lyme 

 in Dorsetshire towards the end of August 1836 ; in September 1839 

 one (in the Warren collection at the Dublin Museum) was obtained 

 at the mouth of the Liffey ; a third was killed, according to Mr. 

 Southwell, near Hornby Castle, Yorkshire, in 1842 ; an adult female 

 containing advanced ova was shot on Hickling Broad, Norfolk, on 

 June 17th 1847, and is in the collection of Mr. J. H. Gurney ; an 

 immature example was procured at the end of August 1851, near 

 Tresco, in the Scilly Islands ; and lastly, an adult picked up on 

 the water near Plymouth — alive but apparently exhausted — in May 

 1865, was presented to me by my late friend the w.uch. regretted 

 Mr. J. Gatcombe. 



This Tern is a very rare straggler to Northern Germany, nor does 

 it often wander up the valley of the Rhone, though it still breeds 

 sparingly in the delta of that river. Large numbers arrive by the 

 middle of April in the marshes of the south-west of Spain ; and, 

 though only known on passage in Italy, there are important colonies 



