GENUS 91. COLYMBUS. DIVER. 
SPECIES. C. GL^CMLIS. 
GREAT NORTHERN DIVER OR LOON, 
[Plate LXXIV.— Fig. 3.] 
Colymbus glacialis, Linn. Syst. ed. 12, tom. i, p. 221, 5. C. immer, 
Id.p. 222, JV’o. 6. — Ind. Orn.p. 799, 1. C, immer Id. p. 800, 2. — 
Le grand Plongeon, Briss. vi, /j. 105, pi. 10, Jig. 1. Le grand 
Plongeontachete, Id.p. 120, 11,/^. 2. — Le grand Plongeon, 
Buff. Ois. viii, p. Z5\. VImbrim, ou grand Plongeon de la mer 
du nord, Id.p. 258, tab. 22. PI. Enl. 952. — J^orthern Diver, 
Lath. Gen. Syn. iii, p. 337. Imber Diver, Id. p. 340. — Penn. 
Drit. Zool.JVo. 237, 238. .Bret. Zool. JSTo. 439, 440. — Bewick, 
II, p. 16B, 170. — Montagu, Orn. Die. Sup. dipp. — Low, Fauna 
Oreadensis, p 108, 110. — Plongeon Imhrim, Temm. Man. 
d’’ Orn.p. 910. — Peale’s Museum, JV*o. 3262, male and young. 
— 3263, female. 
This bird in Pennsylvania is migratory. In the autumn it 
makes its appearance with the various feathered tribes that fre- 
quent our waters; and when the streams are obstructed with ice, 
it departs for the southern states.* In the months of March and 
April it is again seen; and after lingering awhile, it leaves us 
for the purpose of breeding. The loons are found along the coast 
as well as in the interior; but in the summer they retire to the 
fresh water lakes and ponds. We have never heard that they 
breed in Pennsylvania; but it is said they do in Missibisci pond, 
near Boston, Massachusetts. The female lays two large brownish 
eggs. They are commonly seen in pairs, and procure their food, 
which is fish, in the deepest water of our rivers, diving after it, 
and continuing under for a length of time. Being a wary bird, 
it is seldom they are killed, eluding their pursuers by their as- 
* The Loon is said to winter in the Chesapeake Bay. 
