1913] 
Cahn: Birds of Waukesha County 
145 
Hylocichla guttata pallasi (Cabanis). Hermit Thrush 
An abundant migrant, arriving about the end of the first week 
in April, and often common until the third week in May. The 
fall migration begins about September 20, and small flocks of 
three or four — rarely single individuals — are found in sheltered 
places until early November. 
Planesticus migratorius migratorius (Linnaeus). Robin 
An abundant summer resident, and occasionally as winter 
resident, though rare as such. Nesting begins about the second 
week of May, and a second brood is raised late in July. A decu- 
liar nest found in 1910 contained common white string in lengths 
of from 3 inches to 2J feet, and amounting to a total of 68 feet 4 
inches! Where such a quantity of string was found is a mystery, 
Sialia sialis sialis (Linnaeus). Bluebird 
A common summer resident, at present steadily increasing 
in numbers. The birds arrive as early as the middle of March, 
and remain until late October. The usual nesting site is a de- 
serted hole of the red-headed woodpecker, usually in a more or 
less exposed situation, but occasionally in the dense woods. In 
June, 1913, a nest with five eggs was found in the heart of a dense 
maple ( Acer saccharum) grove near Oconomowoc Lake. Often 
a second brood is raised as late as the last of July or even early 
August. 
HYPOTHETICAL LIST 
Branta sp? Brant 
The writer has received innumerable reports of “brant,” but 
has so far been unable to find anyone who can describe the bird, 
and no specimen can be located. Supposed to be more common 
in the spring than in the fall, and is only seen during migrating. 
The only definite information seems to be that the bird is not 
Branta canadensis canadensis (Linnaeus). 
Falco peregrinus anarum Bonaparte. Duck Hawk 
A single record for April 28, 1912, is the only report at hand, 
and as the writer considers this bird somewhat rare, he feels it 
advisable to await further data on the bird. 
