AN1 >Kl AS. 05 



ORDER LONOIPENNES. LONG-WINGED SWIMMERS. 



FAMILY STERCORARIID.. JAEGERS AND SKUAS. 



Two of the six kn\vii incinl>ers of this family an* found in the 

 antaifti. n ^I..IIN while the remaining four inhaliit the tiorthcrti jmrts 

 of the northern hemisphere. Kxrept during the noting sea*m. the 

 Jaegers are as a rule pelagic, though they >>m.-t inn-, vi-n large Indies 

 of watei inland. They generally obtain their f<x.d l>y robbing (iulls 

 and Term, and have been well named the Hawks of the sen. Their 

 greater power of flight enables them to successfully pnr>ue tlu-v birds 

 and force them to disgorge their recently captured prey. 



EET TO TIIK SPECIES. 



A. Bill over 1-85; tarsus over 1-70; middlu tail-feathers never |>inted. 



a. BUI over 1-90 



*. Bill under 1-90 36. I'OMARIXK JAKOKR. 



A Bill under 1-35; tarsus under 1-70; middle tail-feathers generally jN,iiite<l. 



o. Scaly shield on the bill longer Umn the distance fr-.in it.s en.l ( the tip 



of the bill '!". I'ARAKITII- JAKOKR. 



b. Scaly Bhield on the bill shorter than the .li.-tau.-e t'r..m it end t<. the tip 

 of the bill 88. LUXU-TAILKI> JAKOKR. 



35. Me^&lestria skua . I'.mnn.}. SKI-A. Ad. Upper \>HT\*. tail, and 

 wings dark, dirty brown; ahafU uf the wing and uil-tVutliers white, except 

 at the tip ; outer wing-feathers with inner vanes white- at the base ; under parU 

 omen bat lighter; neck more or lots streaked with whitish. Im. "Similar 

 to adult, but more distinctly streaked with yellowish, especially on the head 

 and neck." L., SfrOO ; W^ 15-91 ; Tar., 2-63 ; B., 2-<W> (Kidgw.). 



Rang*.* Coast and islands of the North Atlantic, chiefly northward. 

 South to Spain and Massachusetts. Apparently rare off the coast of North 

 America "(A. 0. U.). 



Long Island, A. V., one record. 



Jfn$e> on rocky cliff*. Egg^ two, pale olive-brown or greenish gray spot- 

 ted with chocolate, 2-80 x 1-90. 



36. Stercorariu* ponutrinos ( TVmm.V POMARIXK JAKOKR. AtL, 

 liykt p\<mt. Verj' similar in e..l..r t<> rresponding phase of .V. parasitism, 

 but with the up|*r parts darker, nearly black. A<l., >l<irk pkaM ami Im. 

 Similar in color to corresponding stages of .V. /iroW/ /<. L, 22-00; W n 

 13-50; T^ Ad n 8-00, Im., 5-40; Tar., 2-00 ; r... 



Jtemart*. This species is to be distinguished fnm the two following bj 

 its larger size and the rounded ends of its central tail-feailn r-. 



Kanyt. " Resident during the sumim-r in ln L 'l. northern hititn.li-.. chiefly 

 within the A and cxtendimr from SiU-ria in eastern Asia entirely 



around the ione n (B., B., and K.). Migrates southward along the Atlantic 

 I 



