Geology topics
R. E. Tomlinson
Publications and source records attributed to R. E. Tomlinson.
Migration, Harvest, and Population Characteristics of Mourning Doves Banded in the Western Management Unit, 1964-1977
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Estimating nest detection probabilities for white-winged dove nest transects in Tamaulipas, Mexico
Nest transects in nesting colonies provide one source of information on White-winged Dove ( Zenaida asiatica asiatica ) population status and reproduction. Nests are counted along transects using standardized field methods each year in Texas and northeastern Mexico by personnel associated with Mexico's Office of Flora and Fauna, the Texas Parks and Wildlife Department, and the U.S. Fish and Wildlife Service. Nest counts on transects are combined with information on the size of nesting colonies to estimate total numbers of nests in sampled colonies. Historically, these estimates have been based on the actual nest counts on transects and thus have required the assumption that all nests lying within transect boundaries are detected (seen) with a probability of one. Our objectives were to test the hypothesis that nest detection probability is one and, if rejected, to estimate this probability.
The Literature of the Western Clapper Rails
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Weights and wing lengths of wild Sonoran masked bobwhites during fall and winter
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Taxonomic status of certain clapper rails of southwestern United States and northwestern Mexico
Examination of 58 Clapper Rail specimens taken in the breeding season from the Colorado Valley and the west coast of mainland Mexico verifies the distinctness of the races Rallus longirostris yomanensis, R. 1. rhizophorae, and R. 1. nayaritensis. Rallus 1. yumanensis is a relatively pale brown, pointed-winged, summer resident of freshwater marshes along the valley and delta of the Colorado River. Late winter specimens of yumanensis have been taken in freshwater and saltwater habitats in the Mexican states of Sinaloa and Puebla. Both R. 1. rhizophorae, a pale grayish bird, and R. 1. nayaritensis, a darker grayish form, are presumed year-round residents of the western Mexican mangrove swamps. Both have more rounded wings than yumanensis. The range of rhizophorae extends south along the coast from central Sonora to central Sinaloa, and that of nayaritensis from central Sinaloa to the vicinity of San Blas, Nayarit. Features of the range and characters of birds where the range of these two races approach each other are unclear.
Distribution of two western clapper rail races as determined by responses to taped calls
During 1969 and 1970, surveys of the endangered Yuma Clapper Rail were conducted using taped calls to elicit responses from the birds. During the two summers, more than 158 Yuma clappers were located in cattailtule marshes along the Colorado River south of Needles, California, to the International Boundary, a distance of about 240 miles. Clappers (probably of the same race) were also found in estuarian marshes of the Colorado River Delta of Mexico; in the Salton Sea; in two freshwater marsh areas near Phoenix, Arizona; and in two freshwater marshes adjacent to the lower Gila River near Tacna, Arizona.....Populations of Sonora Clapper Rails were discovered as permanent residents in five separate mangrove swamps along the west coast of Mexico in the vicinity of Kino Bay, Sonora. These observations were farther north than any heretofore reported for the race R. l. rhizophorae, and the swamps also represent the extreme northward limit of mangroves in Sonora.....During the winter, Yuma clappers did not respond to taped calls north of the International Boundary, whereas clappers along the coast of Sonora readily answered the calls during the same period of time. We conclude that most Yuma Clapper Rails migrate from their summer habitat along the Colorado River in September and do not return to the breeding areas until late April.
Summary of research upon the yuma clapper rail and the masked bobwhite quail
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Current status of the endangered masked bobwhite quail
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Progress of primary feather molt of adult mourning doves in Missouri
The examination of 7,892 adult doves in Missouri between 1953 and 1965 showed that less than 2.5% of adult doves completed their molt before October 1. Adult doves of both sexes began molting their primary feathers during early June in Missouri and lost the last (tenth) primary during the latter half of October. Approximately 140-150 days were required to complete the molt. Thus, early-hatched immatures, which begin their primary molt 25-30 days after hatching, contributed the bulk of the wings with completed molts in September. By correctly classifying September samples of dove wings with a completed molt as young-of-the-year a more accurate young: adult ratio is obtained.
New hope for masked bobwhites in Arizona
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Our bobwhites come home
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Reward banding to determine reporting rate of recovered mourning dove bands
Reward bands placed on the other leg of certain regularly banded immature mourning doves ( Zenaidura macroura ) were used to develop information on reporting rates of recovered dove bands. Reports from 15 widely separated sections of the United States showed considerable variation in recovery rate of doves both with and without reward bands. The overall percentages of banded doves that were reported as recovered were 9.69% for those with reward bands and 3.83% for controls. The bandreporting rate for states influenced by publicity was 66%; that for states not influenced was 32%.
Mourning dove status report, 1966
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Aging mourning doves by outer primary wear
Many immature mourning doves ( Zenaidura macroura ) cannot be aged by the conventional white-tipped primary covert method if molt has proceeded beyond the 7th primary. A new method of aging doves in this group is based on the presence (immature) or absence (adult) of a buff-colored fringe on the tips of the 9th and 10th primaries. Experienced biologists were nearly 100 percent accurate in aging wings of 100 known-age doves from eastern and midwestern states. The technique is not as reliable for doves from southwestern United States because of added feather wear, apparently from harsh vegetative and soil conditions.
A method for drive-trapping dusky grouse
A drive trap, used to capture dusky grouse ( Dendragapus obscurus obscurus ) females and their broods for transplantation, is described. The trap consists of two 75-foot wings, leading to a netting-covered enclosure with a smaller wooden catch box at the rear. A four-man crew finds a brood in open cover and, while one or two men keep the brood under observation, the others rig the trap along the birds' anticipated route to cover. It takes about 10-20 minutes to set up the trap, depending on roughness of terrain, and another 5-60 minutes to make the catch. The trap was tried on seven broods, of which five were caught entire and all but one bird from each of the other two broods were captured. Two additional broods were accidentally flushed before the trap could be used.