THE BIRDS OF FLOYD COUNTY, IOWA. 193 
having nested.near Floyd in 1913; I know of no other nesting 
records in recent years. 
3. Podilymbus podiceps (Linn.)  Pied-billed Grebe. Com- 
mon migrant, and somewhat less common summer resident. 
In 1915 a pair nested within the limits of Charles City. 
4. Gavia immer (Gunn.) Loon. Rare migrant, though 
formerly common as a migrant, and not rare as summer resi- 
dent (Webster). Last reported observation near Charles City, 
March 23, 1916, by W. T. Swartz. 
5..Gavia arctica (Linn.) Black-throated loon. Webster 
states that this species had disappeared prior to 1897. John 
R. Waller tells me that as late as 1870 it was a not uncom- 
mon migrant, but decreased in numbers rapidly after that. I 
have no definite data. 
6. Larus argentatus (Briinn.) Herring Gull. Fairly 
common migrant, being seen in middle to late March. The 
species is common about Clear Lake, in Cerro Gordo county.» 
7. Larus franklini (Sw. & Rich.)  Franklin’s Gull. Un- 
common migrant, probably no longer to be found in the 
county. A specimen was taken near Floyd, in 1898, by W. C. 
Miles. 
| 8. Sterna forsteri (Nutt.) Forster’s Tern. 
9. Sterna hirundo (Linn.). Common Tern. These two 
species, which cannot be distinguished with cerfainty in the 
field, appear to be rather common in Floyd and Cerro Gordo 
counties. One or the other—perhaps both—nests at Clear 
Lake. 
10. Sterna antillaruwm (Less.) Least Tern. Formerly 
an uncommon migrant, occasionally rather common in Cerro 
Gordo County. (Webster). ‘“... very plenty on Clear Lake, 
Iowa,” (Krider, Forty Years’ Notes, p. 82.). I have no 
records for the species. 
11. Hydrochelidon nigra surinamensis (Gmel.) Black 
Tern. A common or tolerably common migrant, arriving in 
late March or early April. Howard Clarke Brown and others, 
as well as myself, have seen them in the neighborhood of 
+ Charles City, and at Willow Pond. 
