July, 1911 COLI.HCTION OF WINTER BIRDS FROM TRINITY AND SHASTA 
121 
on the ground, and they showed so little fear that it was possible to approach with- 
in a few feet of them, and when one got too close they would onh^ fly up into the 
trees nearby. They kept up an incessant soft twittering noise, and for several days 
we had excellent opportunities for observing them at close range, until the throw- 
ing of some apples into their midst caused them to fly off, and they did not return 
before we left. Nine specimens were preserved, nos. 17362-17370. 
Vireo huttoni. Hutton \hreo. Only seen once at Helena, mingling with a 
flock of chickadees. 
Thryomanes bewicki drymoecus. San Joaquin Wren. Not at all common; 
specimen taken at Helena, no. 17372, is .slightly darker than average drymoecus, 
being somewhat intermediate towards calopkoiius. 
Baeolophus inornatus inornatus. Plain Titmouse. Several noted at Tower 
House. 
Penthestes rufescens rufescens. Chestnutdiacked Chickadee. Quite common 
at Helena. 
Chamaea fasciata henshawi. Pallid Wren-tit. Less numerous at Helena than 
Tower House, where their song was most noticeable on bushy hilbsides. A .series 
of fourteen was taken, nos. 17376-17389. It is interesting to note that these are 
the very light interior form rather than, as would seem more natural, the darker 
coast form. 
Psaltriparus minimus minimus. Bush-tit. One flock was seen at Tower 
House and three specimens were taken. Near toi)otypes examined, from Salem, 
Oregon, show a light pileum but the back and breast not appreciably so. Speci- 
mens from Pasadena have pileums as light as the topotype; but others are dark and 
in no case does a decidedly light back accompany the light pileum. Specimens 
from Horse Creek, Siskiyou Mountains, have a dark pileum like that of those from 
Tower House, so that, with such a range of variation, it would .seem the more 
reasonable course at the present time to consider the sub-species califoruicus is not 
well established. 
Regulus calendula. Ruby-crowned Kinglet. Not common at either locality. 
Myadestes townsendi. Townsend Solitaire. Numerous at Tower Hou.se. 
Hylocichla guttata nana. Dwarf Hermit Thrush. Seen quite often, so con- 
sidering their retiring habits they must have been (piite common. 
Planesticus migratorius propinquus. Western Robin. Common at both lo- 
calities. 
Ixoreus naevius. Varied Thrush. Quite common at both localities, with 
robins, but not as easily approached. 
Sialia mexicana occidentalis. Western Bluel)ird. Large flocks seen at Tower 
House. 
NESTING NOTES ON THE DUCKS OE THE BARR LAKE REGION, 
COLORADO 
By ROBERT B. ROCKWELL 
PART I 
T he most important subject which confronted us, when we began a three 
years’ study of the nesting birds of the Barr Lake country north of Denver, 
was that of determining the status of the different species of ducks as 
