. Annotated bibliography on seasonal movements of migratory and resident birds in the California desert. Birds; Bird populations. Figure II. (Left) The spring migration route of Hammond's Flycatcher. A similar pattern is exhibited by the Western Flycatcher (Johnson, 1965, 1973). An early movement ("I") follows the coastal route; later migrants ("2") are more likely to take a direct route across the desert. Figure 12. (Right) The fall migration routes of Hammond Flycatcher and Western Flycatcher (after Johnson, 1970, 1973). Most adults move southward through the mountains an
. Annotated bibliography on seasonal movements of migratory and resident birds in the California desert. Birds; Bird populations. Figure II. (Left) The spring migration route of Hammond's Flycatcher. A similar pattern is exhibited by the Western Flycatcher (Johnson, 1965, 1973). An early movement ("I") follows the coastal route; later migrants ("2") are more likely to take a direct route across the desert. Figure 12. (Right) The fall migration routes of Hammond Flycatcher and Western Flycatcher (after Johnson, 1970, 1973). Most adults move southward through the mountains and coastal strip before crossing the desert. Immatures are found far out over the desert. Similar fall routes may be exhibited by a wide variety of species. Virtually all leave in fall, some species moving as far south as Tierra del Fuego. Lasiewski and Thompson (1966) noted that Swallows in Death Valley can undergo torpor. CROWS AND JAYS. Austin (1971a) conducted year-long censuses of Common Ravens in the Mojave Desert; they were common along roads in winter, un- common along roads in summer. Density was greatest along major roads, indicating that the birds were responding to the availability of road ki I Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jehl, Joseph R; United States. Bureau of Land Management. Riverside District; Hubbs-Sea World Research Institute. San Diego, Calif. : Hubbs/Sea World Research Institute
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