ARKIV FÖR ZOOLOGI. 



BAND 12. N:o 7. 



Hybrid Guils. 



By 



EINAR LÖNNBERG. 



With 3 plates and 6 figures in the text. 



1. Lams fuscus J" x Larus leucopterus $. 



The 2nd Febr. 1910 a specimen of Larus leucopterus 

 Faber was found with one of its wings damaged, and it was 

 thus captured alive by a working man at Lilla Sjötullen 

 outside Stockholm. It was brought to the Zoological Garden 

 of »Skansen» and purchased by the Intendant Mr. Alarik 

 Behm. It lived and thrived at Skansen together with other 

 Gulls some years. After some time it proved to be a female, 

 and it mated with a male Larus fuscus Lin. In the spring 

 1912, the female L. leucopterus laid 3 eggs, and since both 

 parents alternately had incubated the eggs, the happy result 

 was that three young hatched the 15th and 16th of June the 

 same year. All of these were reared. Next year (1913) in 

 a similar way three young were hatched the 9th of June. 

 Unfortunately the female L. leucopterus disappeared in a 

 mysterious way in the autumn 1913, thus further attempts 

 of breeding hybrids was frustrated. 



At my request Mr. Behm kindly allowed the hybrid 

 specimens to be figured for the R. Nat. Hist. Museum. Thus 

 the artist Mr. A. Ekblom painted a young hybrid in its first 

 year and at the same time (1913) also a hybrid in the second 

 year. Låter another artist Mr. A. Österberg painted one of 

 the hybrids in winter plumage the 15th of March 1915, and 



Arkiv för zoolof/i. Bd 12. N:o 7. 1 



