Ki:V TO JIIK WATJiR BIRDS OK I-LOKlI)A. 



59 



Family LARID.E. Gl lls and Ti:rns. 



Srni-AMiLv LARIN^. Gulls. 



Gem s LARUS Linn. 



*s S 



\ 



LARUS MARIN US Linii. 

 Great Black=backed Gull. 



Adult ill siDiiiner : Whole back dark slate color ; outer primaries black, with tip.s and termi- 

 nal spots of white: head and under parts white. 



Adult in winter : Head and neck streaked with gray. Immature birds are mottled dusky and 

 butt": head and neck streaked: tail with narrow subterminal band ; a very large gull. 



Length. 29; Wing, 18: Tail, S: Tarsus. 2.70: Bill, 2.40. 



Coast of North America south to South Carohna : accidental in Florida. 

 Breeds from Northern Maine northward. The nest is built on the i^round ; 

 the eggs are usualh- two, pale brown, marked with chocolate brown. 



A specimen of this gull was shot near St. Augustine during the winter 

 of 1894-5. 



