DUCKS, GEESE AND SWANS OF XOKTII A:\IE1UCA. 



81 



CHEN HYPERBOREA NIVALIS (Forsf.). 

 Greater Snow Goose. 



Adult : Genei':il pliimnn'e, white; primaries, 

 lilack, and primar}- eoverts. pale ash. The im- 

 mature bird has the head, nerk, and upper parts 

 mottled gray and white; the rump and tail are 

 white ; under parts, white. 



Similar to the preeedinj;' siieeiesbut smaller, 

 '•l.ength, 30 to ."iS ; wins, 14..50 to 17; 

 liill, 1.9.T to 2.30." (Ridgw.) 

 Ilaliilal : "North Ameriea, breeding tar nortli-east ot Muc-keuzie 

 II and migrating south in winter ehiclly along tlie Atlautie eoast, 

 lung ('ul)a." (A.O. U.) 



l)asi 

 reae 



The (ircator Snow (toosc does not sccni to lie very 

 abtindant anywhere. Its egos, and even the exaet h)ca- 

 tion of its lircedino' ii'vounds, are unknown. 



<'1k'ii 1i\ liorlturc'il nivalis. 



CHEN C/ERULESCENS (Lniu.). 



Blue Goose. 



K' fi" V" 

 '^' "'•' i..'"i*'lr.". '-/-■■S.J . 







elien ciorulcscuus. 



Ailulf : Ileail aud neck, white or 

 white tinged with orange brown, or 

 white tinged with gi-ayish ; baek aud 

 breast, dark slaty brown; the feathers 

 margined with lighter brown; wing cov- 

 erts and eoiieealed portion of pi'iiinu-ies 

 and secondaries, slaty grai' ; exposed 

 portion of prinmries and secondaries, 

 browuish black; greater portion of the 

 shafts, white; lowei- back and rump, 

 slaty gray; under piarts, diUl slaty gray, 

 the feathers nnn-giued with pale lirowu 

 or rusty brown; axillars, hoary gray 

 with grayish brown shafts. 



"Wing, 1(5.2.5; tail, 5.75; tarsus, 2.75; 

 bill (culmen), 2.37; bill (nostril to tip), 

 1.37 ; (angle of ja«' to tip), 2.30. 



Iliibitat: " Interior of Xorth America, 

 breeding on Eastern shores of Hudson's 

 Bay and migrating south in winter 

 through3Iississippi Valley to Gulf coast; 

 occasional on Atlantic coast." (A.O.I'.) 



