SPRING MIGRATION NOTES OP THE CHICAGO AREA (3) 
1913 1914 1915 1916 1917 i918 1919 1920 
2. Holboell's Grebe Colymbus nolboelli 
: Mar. 20 
Rare visitant; winters on Lake Michigan. One bird remained in the 
park lagoons several days. 
3. Horned Grebe Colymbus auritus 
Apr. 13 Apr. 8 Apr. 9 Mar. 2 4 Apr. 5 Apr. 2 8 
Common migrant. 
6. Pied-billed Grebe Podilymbus podiceps 
Mar. 30 Mar. 26 Apr. 2 Mar. 25 Mar. 26 Mar. 15 Apr. 5 Mar. 30 
Common summer resident; most common during migrations. 
7. Loon Gavia immer 
Apr. 7 Mar. 16 Apr. 1 Apr. 7 
Fairly common migrant. 
11. Red-throated Loon Gavia stellata 
Feb. 21 : 
Very rare winter visitant. One, apparently wounded observed in Jack- 
son Park, Feb. 21, 1915. Woodruff reports three dead birds at Evanston. 
51. Herring Gull Larus argentatus 
Jan. 1 Jan. 1 Jan. 1 Jan. 2 Jan. 1 Jan. 1 Jan. 1 Jan. 1 
Abundant winter resident: a few non-breeding birds remain during the 
summer. 
5 4. Ring-billed Gull Larus delawarensis 
Apr. 2 6 Jan. 2 Jan. 11 Jan. 2 Apr. 6 Jan. 18 Mar. 14 Jan. 1 
A fairly common, but erratic visitant. 
60. Bonaparte's Gull Larus Philadelphia 
Apr. 14 Jan. 1 Mar. 2 9 Mar. 2 7 Mar. 21 Mar. 2 8 Jan. 1 Mar. 2 6 
Common migrant, sometimes wintering. A few non-breeding birds re- 
main during the summer. 
69. Forster's Tern Sterna forsteri 
Apr. 4 May 2 May 3 
Uncommon migrant, but probably more common than generally sup- 
posed, especially in the fall at Miller. 
70. Common Tern Sterna hirundo 
Apr. 30 Apr. 25 Apr. 26 May 2 Apr. 21 Apr. 17 May 9 Apr. 20 
Common migrant. 
77. Black Tern Hydrochelidon nigra surinamensis 
May 24 Apr. 21 May 9 May 1 May 18 May 24 May 1 
Breeds commonly in the sv/amps and small lakes in the vicinity. 
12 9. Merganser Mergus americanus 
Apr. 2 Mar. 9 Jan. 18 J*an. 2 Feb. 19 Jan. 2 6 Jan. 1 Jan. 1 
Common winter resident. 
130. Red-breasted Merganser Mergus serrator 
Mar.30 Mar.30 Mar.25 Jan. 23 Mar. 31 Apr. 13 Mar.l8 -Mar. 18 
Abundant migrant. 
131 Hooded Merganser Lophodytes cucullatus 
Apr. 21 Mar. 1 Apr. 5 Mar. 2 6 
Rare summer resident. 
