Birds of Leelanau: The Clay-Colored Sparrow
In presettlement times, because of extensive dense forest throughout most of the state, Clay-colored Sparrows may not have existed in Michigan, though some habitat, created by periodic fires, probably was present.
Clay-colored Sparrows have a brown crown with black streaks and a distinct buffy or whitish central stripe. It has a broad, whitish eyebrow and a brown cheek outlined by dark postocular and submustachial stripes. It has a gray/clayish colored breast and a more light grey to whitish belly. It has a gray nape and buffy brown back and scapulars with dark streaks. The rump does not contrast with the rest of the back as is the case in many other sparrows.
A hundred years ago this species was viewed by many Michigan birding aficionados as an anomaly, a vagrant, or transient. By the 1950s, likely as a result of lumbering activities, it was viewed as a regular summer resident in select parts of northern Michigan. This population increase and broader distribution trend continues into the present.
Reversion of marginal farm lands to brushy habitat, planting of Christmas tree farms, intensive forest management, and more drought may change the present relatively uncommon status of this species in Michigan.
The first time I encountered the Clay-colored Sparrow, initially, I thought I was hearing a Golden-winged Warbler. I was somewhat dumbfounded because I was biking through a very dry, sandy portion of the Fife Lake Forest in Grand Traverse County that had been lumbered and then replanted with scotch and red pines about 5-7 years previous instead of a more brush/scrub riverine or creek/stream like environment which I was wont to associate with Golden-winged Warblers. The song of this sparrow is a very pronounced and distinctive Bzzzz, bzzz bzzzz bzzz. The tone quality of this bzzz tends to be very consistent however the rhythm and number of bzzzes in succession is not, which distinguishes it from the Golden-winged Warbler.
Leonard Graf, in BIRDS OF LEELANAU COUNTY AND SLEEPEING BEAR DUNES NATIONAL LAKESHORE indicates that Clay-colored Sparrows, though confirmed breeders in Leelanau County, are rare summer residents, and very uncommon transients. “This species is primarily a bird of prairie states and provinces however its breeding range has expanded eastward. In our area, they are seen in shrub-scrub habitats and young conifer plantations. Early arrival date is 4/14. late departure is 10/2 “
The last publication of The Atlas of the Breeding Birds of Michigan shows observation of this species at just one location in Leelanau County just east of Good Harbor Bay.
A Clay-colored Sparrow was observed in Leelanau County this summer, singing in a shrub/scrub area in Section 23 of Centerville Township, along the east side of Sharnowski Rd.
This sparrow is found from across the Great Plains eastward into Minnesota, Michigan, Ontario, and rarely, New York. In Michigan it is found mostly in the UP and in the dry, sandy barrens of the Northern LP. In the LP they occur particularly in Kirtland’s Warbler habitat.
It is a ground gleaner, feeding on insects and seeds. It also feeds on catkins and deciduous tree buds in the spring..
They arrive in Michigan in late April or early May with numbers peaking in the second and third weeks of May.
Males arrive on breeding grounds shortly before females staking out territories that are less than an acre. These territories are vigorously defended by the males which reportedly exclude also song sparrows and chipping sparrows.
The breeding season for this species commences in late May and often lasts into August with second broods. Nests with eggs have been found as early as June 1 and as late as August 1.
This species tends to select one type of nest site within a local population. Its nest, a compact grass cup with a lining of fine materials, is placed above the ground in a grass tuft or at the base of a shrub, or in a low shrub or small tree where it is well hidden. Nests in dense, tall vegetation and those made later in the season tend to be higher above the ground.
Usually there are 3-4 eggs… occassionally as many as five. Both sexes incubate the eggs from10-12 days. The female, however, does most of the brooding with the male occasionally feeding the female. Both sexes tend the young for 8-9 days,
This species is a common cowbird host; parasitized nests are occasionally deserted.
Immature Clay-colored Sparrow resemble Chipping Sparrows. In the fall they often flock together.
Departure from the state occurs in September and the first part of October.
This species forms small post breeding migration flocks. It sometimes joins winter flocks of Brewer’s Sparrows and White-crowned Sparrows in open weedy or brushy habitats.
It winters in the southern tip of Texas, Mexico, and further south.
~bob c.
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