Birds of Heligoland. 19 



215. Parus c.'Eruleus. 



Common in March, and again in September and October. 



21G. Parus palustris. 



Said to have been caught on the island many years ago. 



217. Parus rorealis. 



Said to have visited the island on the 10th of November 

 1881. 



218. Parus kamtschatkensis. 



An example, supposed to have belonged to this species, 

 was seen on the 1st of November, 1876. 



219. Parus cristatus. 



Said to have been caught half a century ago, and to have 

 been once seen since. 



220. ACREDULA caudata. 



An irregular and rare visitor in autumn, still more so in 

 spring. 



221. Panukus biarmicus. 



One shot half a century ago, a second in November 1847, 

 and a third in 1849. Three or four others seen. 



222. CeRTHIA FAMILIARIS. 



A rare visitor in autumn, still rarer in spring, 



223. HiRUNDO RUSTICA. 



Common from the middle of April to the end of May, and 

 again from the middle of September to the end of October. 



224. HiRUNDO CAHIRICA. 



An example, supposed to have belonged to this species, seen 

 on the 20th and 21st of May, 1881. 



225. HiRUNDO RUFULA. 



One shot in May 1885. 



226. Chelidon urbica. 



Arrives in some numbers, a little later in spring and a little 

 earlier in autumn than Hirundo rustica. 



227. COTILE RIPARIA. 



Very common in sprhig and autumn. 



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