. The birds of Illinois and Wisconsin . 53. Marila marila (Linn.). Scaup Duck. Aythya marila nearctica Stejn., A. O. U. Check List, 1895, P- 53-Local : Bluebill or Blackhead. 334 Field Museum of Natural History — Zoology, Vol. Distr.: Northern hemisphere, breeding chiefly (in North America)from North Dakota to Alaska and casually to the Gulf of St. greater number go south in winter to the Gulf states, Mexico, andthe West Indies. Adult male: Head and neck and upper breast, black, showing green-ish reflections; back, grayish white, delicately lined with fine, wavylines of
. The birds of Illinois and Wisconsin . 53. Marila marila (Linn.). Scaup Duck. Aythya marila nearctica Stejn., A. O. U. Check List, 1895, P- 53-Local : Bluebill or Blackhead. 334 Field Museum of Natural History — Zoology, Vol. Distr.: Northern hemisphere, breeding chiefly (in North America)from North Dakota to Alaska and casually to the Gulf of St. greater number go south in winter to the Gulf states, Mexico, andthe West Indies. Adult male: Head and neck and upper breast, black, showing green-ish reflections; back, grayish white, delicately lined with fine, wavylines of black, giving it a grayish appearance;speciiliDii, zvhite; under parts, white, the lowerbelly showing grayish tinge. Length, 19; wing^; tarsus, , bill, 2. Adult female: Patch atthe base of the bill, white orgrayish white; rest of theliead and neck, breast, andupper back, brownish; belly,white; speculum, white. Length, ; wing, ;tarsus, ; bill, Scaup Duck occurs on Lake Michigan and waters in the in-terior of Illinois and Wisconsin during the migrations. More or lesscommon, varying in different seasons, but rare in comparison withnext species. 54. Marila affinis (Eyton).Lesser Scaup Duck. Aythya affin
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookidbirdsofillinoisw00cory
