Conservation committee report. Falconry: Effects on raptor populations and management in North America
C.E. Braun, J.H. Enderson, Charles J. Henny, H. Meng, A.G. Nye Jr.
1977, The Wilson Bulletin (89) 360-369
The art of falconry in North America, practiced by a few individuals for many years, attracted little attention until the 1960?s. Presently about 2800 falconers are licensed in the United States with less than one half considered to be active. While interest in this art is expected to increase, we...
A population analysis of two species of streamside salamanders, genus Desmognathus
R.J. Hall
1977, Herpetologica (33) 109-113
Desmognathus fuscus and Desmognathus ochrophaeus mere studied over a 6-wk period by mark-recapture and removal methods. Density is ~. 0.8/m2 in D. fuscus and 0.6 - l.l/m2 in D. ochrophaeus; respective biomass densities are 1.5 and 1.0 g/m2. Adjusted estimates indicate a greater proportion of adults in D. ochrophaeus. The...
Woodcock nesting habitat in northern Wisconsin
L.E. Gregg, J.B. Hale
1977, The Auk (94) 489-493
Of 32 woodcock nests studied in northern Wisconsin, 29 were in forest stands dominated by aspen, and 3 were in northern hardwoods. Well-drained, upland nest sites near the brushy edges of poorly stocked poletimber stands were apparently preferred. More than 30 woody plant species were found at the...
Residues of organochlorines and heavy metals in tissues and eggs of brown pelicans, 1969-73
L. J. Blus, B.S. Neely Jr., T. G. Lamont, B.M. Mulhern
1977, Pesticides Monitoring Journal (11) 40-53
Shells of brown pelican (Pelecanus occidentalis) eggs collected in South Carolina from 1969 through 1973 were significantly thinner than shells of those collected before 1947. Residues of 10 organochlorine pollutants and 10 heavy metals were found in these eggs. Total organochlorine residues were apparently magnified 23 times from fish to...
Suspected lead toxicosis in a bald eagle
E. Jacobson, J. W. Carpenter, M. Novilla
1977, Journal of the American Veterinary Medical Association (171) 952-954
An immature bald eagle (Haliaeetus leucocephalus) was submitted to the University of Maryland, College Park, for clinical examination. The bird was thin, had green watery feces, and was unable to maintain itself in upright posture. Following radiography, the bird went into respiratory distress and died. Numerous lead shot were recovered...
Responsiveness of 6 to 14 generations of birds to dietary dieldrin toxicity
E. F. Hill, J. W. Spann, J.D. Williams
1977, Toxicology and Applied Pharmacology (42) 425-431
The lethal dietary toxicity of dieldrin was estimated repeatedly during 8 years of testing young bobwhites (Colinus virginianus), Japanese quail (Coturnix c. japonica), ring-necked pheasants (Phasianus colchicus), and mallards (Anas platyrhynchos). Toxicities, quantified as 8-day LC50 values (5 days on toxic diet, followed by 3 days of untreated feed), were...
The use of feeding habitat by a colony of herons, egrets, and ibises near Beaufort, North Carolina
Thomas W. Custer
1977, Conference Paper, Proceedings of the 1977 conference of the colonial waterbird group
Nine species of herons were followed to their feeding sites from a nesting colony near Beaufort, North Carolina, by airplane. Except for the Cattle Egret, which flew exclusively to fields and dumps, all other species flew mainly to saltmarsh habitat. In addition, habitats were selected in relation to tidal...
Bird atlasing in the United States
C.S. Robbins
1977, Polish Ecological Studies (3) 325-328
Since the Breeding Bird Survey provides an annual quantitative sample of about 75% of the 1? blocks of latitude and longitude in every state except Alaska and Hawaii, and 47% of the 1/2? blocks (equivalent on the average to a 48 km square), no national Atlas based on merely presence...
Ticks as a factor in nest desertion of California brown pelicans
Kirke A. King, James O. Keith, Christine A. Mitchell, James E. Keirans
1977, The Condor (79) 507-509
In summary, our observations suggest that O. denmarki may be an important environmental factor influencing the distribution and success of Brown Pelican nests in the Gulf of California. More information on these relationships may be unobtainable without seriously disturbing and destroying large numbers of nests....
A comparison of 2 techniques for estimating deer density
C.S. Robbins
1977, American Birds (31) 562
We applied mark-resight and area-conversion methods to estimate deer abundance at a 2,862-ha area in and surrounding the Gettysburg National Military Park and Eisenhower National Historic Site during 1987-1991. One observer in each of 11 compartments counted marked and unmarked deer during 65-75 minutes at dusk during 3 counts in...
Experimental feeding of DDE and PCB to female big brown bats (Eptesicus fuscus)
D. R. Clark Jr., R. M. Prouty
1977, Journal of Toxicology and Environmental Health (2) 917-928
Twenty-two female big brown bats (Eptesicus fuscus) were collected in a house attic in Montgomery County, Maryland. Seventeen were fed mealworms (Tenebrio molitor larvae) that contained 166 ppm DDE; the other five were fed uncontaminated mealworms. After 54 days of feeding, six dosed bats were frozen and the remaining 16...
Effects of DDE on experimentally poisoned free-tailed bats (Tadarida brasiliensis): Lethal brain concentrations
D. R. Clark Jr., J.C. Kroll
1977, Journal of Toxicology and Environmental Health (3) 893-901
Adult female free-tailed bats (Tadarida brasiliensis) were collected at Bracken Cave, Texas, and shipped to the Patuxent Wildlife Research Center. Treated mealworms (Tenebrio molitor) containing 107 ppm DDE were fed to 17 bats; five other bats were fed untreated mealworms. After 40 days on dosage, during which one dosed bat...
Photo-optical enhancement of landsat imagery for land use in south-central Iowa
James R. Lucas, James V. Taranik, Frederic C. Billingsley
1977, Report
Because the photographic laboratory at the Jet Propulsion Laboratory found it difficult to estimate what were the optimal color renditions of the Iowa landscape for land classification purposes, the Iowa Geological Survey developed its own capability for producing color products from digitally enhanced Landsat data. Research has now shown that...
Status, distribution, and movements of martens in northeastern Minnesota
L.D. Mech, L.L. Rogers
1977, Research Paper NC-143
The decline of martens in Minnesota is reviewed and a recent increase documented. Adjacent and partially overlapping home ranges of 4.3 to 19.9 sq km were determined by telemetry for a female and three males. Habitat use is described. If current trapping and timber management practices persist, martens should continue...
Newsletter for the Accelerated Research Program for migratory shore and upland game birds
R.A. Coon
1977, Newsletter for the Accelerated Research Program for migratory shore and upland game birds No. 2.
Hawaiian Bird Bibliography
K. W. Bridges, M.S. Bridges, W.E. Banko
1977, Cooperative National Park Resources Studies Unit, Technical Report 14.
The current status of woodcock and woodcock surveys in the United States
J. Tautin
Daniel M. Keppie, Ray B. Owen Jr., editor(s)
1977, Book chapter, Proceedings of the Sixth Woodcock Symposium, held at Fredericton, New Brunswick, October 4, 5 and 6
A comparison of American woodcock (Philohela minor) wing collection survey data for 1975-76 and 1976-77 showed that there was little change in the indices to breeding success and hunter success between years in the Atlantic and Central regions. The 1977 breeding population index was up 15.2 percent from 1976 in...
Identification of potential harvest units in the United States of the American woodcock
R.A. Coon, T.J. Dwyer, J.W. Artmann
Daniel M. Keppie, Ray B. Owen Jr., editor(s)
1977, Book chapter, Proceedings of the Sixth Woodcock Symposium, held at Fredericton, New Brunswick, October 4, 5 and 6
Potential harvest units were examined in the United States for American woodcock (Philohela minor) based on the distribution of both direct and indirect recoveries of preseason bandings. Unweighted and weighted recoveries were used to definefour sets of units with a minimal interchange of birds. With a configuration that...
Woodcock utilization of commercial timberlands in the northeast
C.P. Nicholson, S. Homer, Ray B. Owen, T.G. Dilworth
1977, Book chapter, Proceedings of the Sixth Woodcock Symposium, held at Fredericton, New Brunswick, October 4, 5 and 6
This paper reports the results of studies in Maine (1975-77) and New Brunswick (1974) on the utilization of commercial timber areas by woodcock (Philohela minor). Openings created by logging operations were utilized for singing grounds and nocturnal roosting habitat. Singing male densities of 3.4 birds/1oo ha on were...
Research, management, and status of the osprey in North America
Charles J. Henny
R.D. Chancellor, editor(s)
1977, Book chapter, World Conference on Birds of Prey, Vienna, 1-3 October, 1975. Report of Proceedings
Osprey populations were studied throughout North America during the last decade as a result of dramatic declines reported along the North Atlantic Coast in the1950s and early 1960s. Researchers used banding, localized studies, aerial surveys, and pesticide analyses to identify factors influencing regional populations. Declining populations showed extremely...
Earthworm populations as related to woodcock habitat usage in Central Maine
J.W. Reynolds, W.B. Krohn, G.A. Hordan
Daniel M. Keppie, Ray B. Owen Jr., editor(s)
1977, Book chapter, Proceedings of the Sixth Woodcock Symposium, held at Fredericton, New Brunswick, October 4, 5 and 6
Lumbricid earthworms were sampled 'on two central Maine study areas between late April and early September, 1974, to relate earthworm abundance to use of feeding covers by American woodcock(Philoheli minor). On sampling days, occurring at 2 to 3 week intervals, a formalin solution was applied to thirty O.25m areas in...
Impact of estuarine pollution on birds
L. J. Blus, Stanley N. Wiemeyer, J.A. Kerwin, Rey C. Stendell, H. M. Ohlendorf, L.F. Stickel
1977, Book chapter, Estuarine Pollution Control and Assessment, Proceedings of a Conference held February 11-13, 1975
Pollution of estuaries affects bird populations indirectly through changes in habitat and food supply. The multi-factor pollution of Chesapeake Bay has resulted in diminution of submerged aquatic plants and consequent change in food habits of the canvasback duck. Although dredge-spoil operations can improve wildlife habitat, they often result...
Experimental woodcock management at the Moosehorn National Wildlife Refuge
G.F. Sepik, Ray B. Owen, M.W. Coulter
Daniel M. Keppie, Ray B. Owen Jr., editor(s)
1977, Book chapter, Proceedings of the Sixth Woodcock Symposium, held at Fredericton, New Brunswick, October 4, 5 and 6
The purpose of this study is to develop woodcock(Philohela minor) management techniques that can be easily used by the small landowner or incorporated with other land management operations such as commercial timber harvesting. The Moosehorn National Wildlife Refuge contains areas which are characteristic of the abandoned farms now being purchased...
Quantitative analysis of American woodcock nest and brood habitat
A. Bourgeois
Daniel M. Keppie, Ray B. Owen Jr., editor(s)
1977, Book chapter, Proceedings of the Sixth Woodcock Symposium, held at Fredericton, New Brunswick, October 4, 5 and 6
Sixteen nest and 19 brood sites of American woodcock (Philohela minoI) were examined in northern lower Michigan between 15 April and 15 June 1974 to determine habitat structure associated with these sites. Woodcock hens utilized young, second-growth forest stands which were similar in species composition for both nesting and brood...
The status and distribution of woodcock in Oklahoma
J.S. Barclay, R.W. Smith
Daniel M. Keppie, Ray B. Owen Jr., editor(s)
1977, Conference Paper, Proceedings of the Sixth Woodcock Symposium, held at Fredericton, New Brunswick, October 4, 5 and 6
The seasonal and spatial distributions of the American woodcock (Philohela minor) in Oklahoma were determined through field surveys and the collection of all known reports of woodcock sightings. Woodcock were reported in Oklahoma in all seasons and were most Jrequently sighted from 11 October to 10 January. The peak...
