Bird lore - Project Puffin

The Migration of North American Birds
Compiled by Prof. W. W. Cooke, Chiefly from Data in the Biological Survey
With a drawing by Louis Agassiz Fuertes
(See Frontispiece)
THE BUSH-TIT
All of the forms of Bush-Tits in the United States are non-migratory. The
present species, which is better known by the name of the Least Bush-Tit, is
confined to the Pacific Coast, where it ranges from northern Lower California
to southern British Columbia. This is the range of the typical form {Psaltri-
parus minimus minimus), while a subspecies called the California Bush-Tit
{Psaltriparus minimus californicus) occurs over much of eastern California
east of the Sacramento Valley, from the southern end of the Sierras nearly to
the Oregon line. A third form, or sub-species, the Grinda Bush-Tit {Psaltri-
parus minimus grindce), is confined to the southern end of Lower California.
THE LEAD-COLORED BUSH-TIT
The southern boundary of the range of the Lead-colored Bush-Tit (Psaltri-
parus plumbeus) is found in western Texas, northern Mexico, southeastern to
northwestern Arizona, and the Providence Mountains, California. Thence it
occurs north to central and northwestern Colorado, northern Utah and northwestern
Nevada. A few individuals have been noted in southwestern Wyoming
and southeastern Oregon.
LLOYD'S BUSH-TIT
Scarcely coming across the boundary from its real home in northern Mexico,
the Lloyd Bush-Tit {Psaltriparus melanotis lloydi) occurs in the southern part
of the mountains of western Texas and barely crosses the line in southwestern
New Mexico.
THE VERDIN
Confined to the borderland of the southwestern United States, the Verdin
in its typical form {Auriparus flaviceps flaviceps) is one of the most interesting
birds of the desert and semi-arid districts, and is non-migratory. It ranges
north to southeastern California, southern Nevada, northwestern Arizona (and
extreme southwestern Utah), southwestern and southeastern New Mexico,
western and southern Texas, and south into northern Mexico and the northern
half of Lower California. The southern half of Lower California is occupied
by a subspecies called the Cape Verdin {Auriparus flaviceps Camprocephalus).
THE WREN-TIT
The known ranges of the various forms, or subspecies of the Wren-Tit are
given in the following paper. All the forms are non-migratory.
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