J Alibi HRS A N1) SK UAS. 
     
    
   
   
    
     C; 
     
     ’t 
     
    
   
   
    
     ORDER LONGIPENNES. LONG-WINGED SWIMMERS. 
     
    
   
   
    
     FAMILY STERCORARIID/E. JAEUERS AND SKUAS. 
     
    
   
   
    
     Two of the six known 111e1nl1e1's of this family are found in the 
     
     antarctic regions, while the remaining four inhabit the northern parts 
     
     of the northern l1e111ispl1e1'e. Except during the nesting season, the 
     
     Jaegers are as a rule pelagic, though they sometimes Visit large bodies 
     
     of water inland. They generally obtain their food by robbing Gulls 
     
     and Terns, and have been well named the llawks of the sea. Their 
     
     greater power of flight enables them to successfully pursue these birds 
     
     and force them to disgorge their reeently captured prey. 
     
    

    
     KEY TO Till-Z SPEt'IES. 
     
     .1. Bill over 1'35: tarsus over 1'70; middle tail—feathers never pointed. 
     
     (l. Billorerl'tm. . . . . . . . . . . . . . . . . . 35. SKU\. 
     
     ’1. Bill under 1-110. . . . . . . . . . . . .lUUARlVF Janene. 
     
    
   
   
    
     11‘. Bill under 1371; tarsus under 170: 111iddle tail 11.1mm :fellclztlh pointed. 
     
     a Sealy shield on the bill longer than the distanee i'1otn its end to the tip 
     
    
   
   
    
     oftl1el1ill.. . . . . . . . . . . . . l’AnAsnie J ”101511. 
     
     b. Scalv shield 011 the bill shortti than the distance than its end to the tip 
     
     01 the bill . . . . . . . . . . . . . 35. Lose-1.1111121) JAEUJZR. 
     
    
   
   
    
     35. Megalestris skua. t1h'17nu.1. 811121. .rlr/.—-l'pperparts.tuil.and 
     
     wings tlzirl<,1lii‘ty brown; shat'ts of the wing,r and tail—feathers white. except 
     
     at the tip; outer wing-feathers with inner vanes white at the base: under parts 
     
     smnewhat lighter: neck more or less streaked with whitish. [nu—“Similar 
     
     to adult, but more distinetl_\~ streaked with yellowish. espeeially on the head 
     
     and neck.” .., 221111 \\'.. 1.1-111: T1112. $113; 1%., 2‘06 tltiduwn). 
     
    

    
     lt'ang/c.~‘ l 1111st ahd islands of the North .\tlantie. ehietl)‘ northward. 
     
    
   
   
    
     South to Spain and Massachusetts. Apparently rare 011‘ the coast of North 
     
     America ‘7 t.\. H. [7.1. 
     
    
   
   
    
     Long Island. A. \'.. one reeord. 
     
    
   
   
    
     Yu't f)1]1‘11cl{_\‘cliils [was two pale oli\e-l11m\n or greenish gm} spot- 
     
     ted with chocolate 1! s0 x 1 1m 
     
    
   
   
    
     36. Stercorarius pomarinus 1 Tran/1.1. I’o.\1.\1:1.\‘r. JAEGER. .14., 
     
     (115/11: [Mamas-Very similar in eolor to 1-1irrespoiali11er phase of .s'.[yarns/[17713, 
     
     but with the upper parts darker. nearly ldaek. .-1«/.. dark pause um/ Inns 
     
     Similar in color to corresponding stages of ,s Inu'qx/(ims, 11.. 2-3-0”; \V., 
     
     13270; T.. 1\d., W10, 1111.. 540; Tara 2'01); l§.. 12171. 
     
    

    
     lt’t’lIl/U'l'VV'l‘lllR speeies is to be distinguished from the two tollowing by 
     
     its larger size and the rounded ends of its central tail—feathers. . 
     
    

    
     Hung/as" llesident during the summer in high northern latitudes. el1iefly 
     
     within the Ari-tie t‘irele. and extending t'rntn Siberia in eastern Asia entirely 
     
     around the zone," 11%., 13., and l{.1. Migrates southward along the Atlantic 
     
    

    
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