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Articles 121 - 150 of 1402
Full-Text Articles in Ornithology
Wpa News 97 (2015), World Pheasant Association
Wpa News 97 (2015), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Summer 2015), number 97
Published by the World Pheasant Association
Shorebird Migratory Stopover Responses To Local And Regional Change: Habitat Decisions In A Vanishing Landscape, Caitlyn Gillespie
Shorebird Migratory Stopover Responses To Local And Regional Change: Habitat Decisions In A Vanishing Landscape, Caitlyn Gillespie
School of Natural Resources: Dissertations, Theses, and Student Research
Understanding the consequences of anthropogenic change for migratory species is challenging because although they have evolved to cope with environmental uncertainty, migrants still rely on predictable relationships within and among habitats to make informed decisions. Calidris shorebirds rely on ephemeral wetlands during northward migration through mid-continental North America, where favorable habitat conditions are annually and regionally unpredictable and increasingly altered by land-use change. During spring 2013 and 2014, we assessed Calidris habitat use in the Rainwater Basin (RWB) and the Prairie Pothole Region (PPR) at both local and landscape scales. Although anthropogenic change has altered the wetland landscape in both …
Wpa News 96 (2015), World Pheasant Association
Wpa News 96 (2015), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Spring 2015), number 96
Published by the World Pheasant Association
Wpa News 98 (2015), World Pheasant Association
Wpa News 98 (2015), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Winter 2015), number 98
Published by the World Pheasant Association
Avian Diversity Across Three Distinct Agricultural Landscapes In Guadalupe, Chiriquí Highlands, Panama, Jarred Jones
Avian Diversity Across Three Distinct Agricultural Landscapes In Guadalupe, Chiriquí Highlands, Panama, Jarred Jones
Independent Study Project (ISP) Collection
Deforestation of tropical forest for agricultural purposes threatens habitat loss of native species. The value of various agricultural landscapes in conserving avian populations is useful in determining diversity-conscious development plans. However, generalized results from regionalscale studies cannot be implemented to insular avian habitats. This study serves as the only current avian diversity study of the Chiriquí Highlands. To determine the effect of agricultural land use within an insular avian habitat, I compared avian diversity and site population similarity in Guadalupe, Chiriquí Highlands of the Talamanca Range, Panama. I hypothesized that avian diversity is greatest at forest edge followed by forest …
Wpa News 94 (2014), World Pheasant Association
Wpa News 94 (2014), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Summer 2014), number 94
Published by the World Pheasant Association
Across-Year Social Stability Shapes Network Structure In Wintering Migrant Sparrows, Daizaburo Shizuka, Alexis S. Chaine, Jennifer Anderson, Oscar Johnson, Inger Marie Laursen, Bruce E. Lyon
Across-Year Social Stability Shapes Network Structure In Wintering Migrant Sparrows, Daizaburo Shizuka, Alexis S. Chaine, Jennifer Anderson, Oscar Johnson, Inger Marie Laursen, Bruce E. Lyon
School of Biological Sciences: Faculty Publications
Migratory birds often form flocks on their wintering grounds, but important details of social structure such as the patterns of association between individuals are virtually unknown. We analysed networks of co-membership in short-term flocks for wintering golden-crowned sparrows (Zonotrichia atricapilla) across three years and discovered social complexity unsuspected for migratory songbirds. The population was consistently clustered into distinct social communities within a relatively small area (~ 7 ha). Birds returned to the same community across years, with mortality and recruitment leading to some degree of turnover in membership. These spatiotemporal patterns were explained by the combination of space …
Rare Trophy Varmint Bagged, Paul A, Johnsgard
Rare Trophy Varmint Bagged, Paul A, Johnsgard
Paul Johnsgard Collection
This beast was shot during a special hunting season on hummingbirds opened by the Game and Parks Commission after reports of possible threats to people and livestock.
It was taken in one shot at 15 yards with a high-powered Canon and special high-velocity electronic ammunition. The state is now safer for everyone.
P. (Dead-eye) Johnsgard
Wpa News 93 (2014), World Pheasant Association
Wpa News 93 (2014), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Spring 2014), number 93
Published by the World Pheasant Association
G@Llinformed: Newsletter Of The Iucn-Ssc Galliformes Specialist Group 8-13 (2014-2017), Iucn Species Survival Commission Galliformes Specialist Group
G@Llinformed: Newsletter Of The Iucn-Ssc Galliformes Specialist Group 8-13 (2014-2017), Iucn Species Survival Commission Galliformes Specialist Group
Galliformes Specialist Group and Affiliated Societies: Newsletters
Issue 8 (April 2014)
From the Co-chairs, Peter Garson and Ilse Storch
Co-chairs advisory board members
G@llinformed letters and reports
The EAZA Cracid TAG: What about it? Cathy King
The EAZA Galliformes TAG update, Jan Dama
The last indigenous black-necked pheasant population of Europe, Christos Sokos and Periklis Birtsas
The ecological requirements of the spotted wood-quail Odontophorus guttatus in Noj K'a'ax Meen Elijio Panti National Park, Roni Martinez and Jack Clinton Eitniear
Honduran Ornithological Society-Ocellated Quail Conservation Project, Jack Clinton Eitniear
Venezuelan wood-quail: Request for information, Jack Clinton Eitniear
Hume’s pheasant in Nagaland, Lansothung Shitiri
Strategic conservation planning workshop for …
Wpa News 95 (2014), World Pheasant Association
Wpa News 95 (2014), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Winter 2014), number 95
Published by the World Pheasant Association
Nest Destruction Elicits Indiscriminate Con- Versus Heterospecific Brood Parasitism In A Captive Bird, Rachel C. Shaw, William E. Feeney, Mark E. Hauber
Nest Destruction Elicits Indiscriminate Con- Versus Heterospecific Brood Parasitism In A Captive Bird, Rachel C. Shaw, William E. Feeney, Mark E. Hauber
Publications and Research
Following nest destruction, the laying of physiologically committed eggs (eggs that are ovulated, yolked, and making their way through the oviduct) in the nests of other birds is considered a viable pathway for the evolution of obligate interspecific brood parasitism. While intraspecific brood parasitism in response to nest predation has been experimentally demonstrated, this pathway has yet to be evaluated in an interspecific context. We studied patterns of egg laying following experimental nest destruction in captive zebra finches, Taeniopygia guttata, a frequent intraspecific brood parasite. We found that zebra finches laid physiologically committed eggs indiscriminately between nests containing conspecific eggs …
Changes In Avian Vocalization Occurrence And Frequency Range During The Winter, Amy I. Oden
Changes In Avian Vocalization Occurrence And Frequency Range During The Winter, Amy I. Oden
School of Natural Resources: Dissertations, Theses, and Student Research
Human population expansion has led to an increase in vehicle traffic and therefore vehicle noise. Traffic and traffic noise has been shown to affect avian abundance, breeding success, density and species diversity on the landscape. Documented changes in avian vocalizations due to traffic noise include shifts in amplitude, frequency, rate, timing, and duration of vocalizations along with a number of behavioral adaptations. During the winters of 2011–2012 and 2012–2013, we recorded and measured the “chick-a-dee” vocalization of Black-capped Chickadees (Poecile atricapillus) and the “po-ta-to-chip” vocalization of American Goldfinches (Spinus tristis) to determine …
Wpa News 91 (2013), World Pheasant Association
Wpa News 91 (2013), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Spring 2013), number 91
Published by the World Pheasant Association
The Effect Of Visual Wulst Lesions And Trigeminal Nerve Sectioning On The Discrimination Of Magnetic Inclination In The Homing Pigeon (Columba Livia), Merissa Acerbi
Honors Projects
The ability of homing pigeons to return to their loft from unknown places has fascinated scientists for centuries. It is well established that homing pigeons, like migratory birds, posses an innate magnetic inclination compass to determine direction by measuring the angle between the magnetic field vector and the Earth's surface. Recent work has indicated that the avian magnetic compass is light mediated and appears to mediate magnetic information to the brain. This occurs via a visual pathway with processing in the visual Wulst area of the forebrain. There is, however, also evidence from other avian species that magnetic direction may …
Wpa News 90 (2013), World Pheasant Association
Wpa News 90 (2013), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Winter 2013), number 90
Published by the World Pheasant Association
Annual Review Of The World Pheasant Association, 2012/2013, World Pheasant Association
Annual Review Of The World Pheasant Association, 2012/2013, World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials
Annual Review of the World Pheasant Association, 2012/2013
Chairman of Trustees' Report, Richard carden
Obituary: John Heyworth (August 21, 1925-November 24, 2012)
Activities of Conservation Breeding Advisory Group, 2012/2013, Nigel Hester
Back Grouse Project, Mieke Zwart
Minutes of the Annual General Meeting of the World Pheasant Association (September 12, 2012: Hertfordshire, United Kingdom)
Treasurer’s Report for the year ended April 30, 2013, Jon Riley
Myanmar Pheasant Survey Programme progress in 2013, Alexander Pack-Blumenau and Karl-Heinz Grabowski
Focus groups, reports
2013 Pipar Pheasant Survey, Laxman Prasad Poudyal
Wpa News 92 (2013), World Pheasant Association
Wpa News 92 (2013), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Winter 2013), number 92
Published by the World Pheasant Association
Changing Room Cues Reduces The Effects Of Proactive Interference In Clark’S Nutcrackers, Nucifraga Columbiana, Jody L. Lewis, Alan C. Kamil, Kate E. Webbink
Changing Room Cues Reduces The Effects Of Proactive Interference In Clark’S Nutcrackers, Nucifraga Columbiana, Jody L. Lewis, Alan C. Kamil, Kate E. Webbink
Avian Cognition Papers
To determine what factors are important for minimizing interference effects in spatial memory, Clark’s Nutcrackers, Nucifraga columbiana were tested for their spatial memory for two serial lists of locations per day. In this experiment two unique landmark sets were either different between List 1 and List 2 or the same. We found that Nutcrackers were most susceptible to interference when the landmark sets were the same. This study suggests that repeatedly testing animal memory in the same room, with the same cues, can hamper recall due to interference.
Differences In Relative Hippocampus Volume And Number Of Hippocampus Neurons Among Five Corvid Species, Kristy L. Gould, Karl E. Gilbertson, Andrew J. Hrvol, Joseph C. Nelson, Abigail L. Seyfer, Rose M. Brantner, Alan C. Kamil
Differences In Relative Hippocampus Volume And Number Of Hippocampus Neurons Among Five Corvid Species, Kristy L. Gould, Karl E. Gilbertson, Andrew J. Hrvol, Joseph C. Nelson, Abigail L. Seyfer, Rose M. Brantner, Alan C. Kamil
Avian Cognition Papers
The relative size of the avian hippocampus (Hp) has been shown to be related to spatial memory and food storing in two avian families, the parids and corvids. Basil et al. [Brain Behav Evol 1996;47: 156-164] examined North American food-storing birds in the corvid family and found that Clark’s nutcrackers had a larger relative Hp than pinyon jays and Western scrub jays. These results correlated with the nutcracker’s better performance on most spatial memory tasks and their strong reliance on stored food in the wild. However, Pravosudov and de Kort [Brain Behav Evol 67 (2006), 1-9] raised questions …
Review Of Birds Of Southwestern Nebraska: An Annotated Check-List Of Species In The North And South Platte River Valleys And At Lake Mcconaughy. By Mary Bomberger Brown, Stephen J. Dinsmore, And Charles R. Brown., Wayne Mollhoff
Great Plains Research: A Journal of Natural and Social Sciences (through 2013)
Opening with a map of the region under study, Birds of Southwestern Nebraska proceeds, in its introduction, to a summary of the presettlement landscape and a description of the large-scale habitat changes occurring since then, along with avian responses to those changes. While crediting previous avian studies in southwestern Nebraska, often not readily available to the public, the authors note this area initially received little attention from ornithologists, who tended to focus on other biologically unique parts of the state, such as the Sandhills, forests, and Pine Ridge. The body of the book consists of a list of species reported …
Review Of Conspecific Attraction And Area Sensitivity Of Grassland Birds, David R.W. Bruinsma, Nicola Koper
Review Of Conspecific Attraction And Area Sensitivity Of Grassland Birds, David R.W. Bruinsma, Nicola Koper
Great Plains Research: A Journal of Natural and Social Sciences (through 2013)
Many species of grassland birds are area sensitive, which may exacerbate the ecological effects of the extensive loss and fragmentation of grasslands that has taken place across the northern Great Plains. However, the reasons for this area sensitivity are unclear, as vegetation structure, matrix composition, and restriction of movements among patches do not seem to provide viable explanations for species native to grasslands. Con specific attraction, whereby species are behaviorally stimulated to select habitat or establish territories near individuals of the same species, may help explain this area sensitivity. We review and discuss theoretical and empirical research on avian conspecific …
Annual Review Of The World Pheasant Association, 2011/2012, World Pheasant Association
Annual Review Of The World Pheasant Association, 2011/2012, World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials
Chairman of Trustees' report, Richard Carden
Obituary: Reinhard Kruger (1938?-June 14, 2012)
Treasurer's report for the year ended April 30, 2012, Jon Riley
Achieving our charitable objectives, Philip J. K. McGowan
Galliformes Specialist Group, Peter J. Garson and Ilse Storch
Conserving Djibouti's priority land animals, Philip J.K. McGowan
Assessing the future of species on the brink, Matt Grainger
Myanmar workshop, Philip J. K. McGowan
What is the status of peafowl in Vietnam? Tommaso Savini, Vy Nguyen, and Niti Sukumal
Highlights from the European Conservation Breeding Group, Ludo Pinceel
Pipar project
Channel Width And Least Tern And Piping Plover Nesting Incidence On The Lower Platte River, Nebraska, Joel G. Jorgensen, Mary Bomberger Brown, Andrew J. Tyre
Channel Width And Least Tern And Piping Plover Nesting Incidence On The Lower Platte River, Nebraska, Joel G. Jorgensen, Mary Bomberger Brown, Andrew J. Tyre
Great Plains Research: A Journal of Natural and Social Sciences (through 2013)
Endangered interior least terns (Sternula antillarum athalassos) and threatened northern Great Plains piping plovers (Charadrius melodus) nest together on midstream sandbars in large rivers in the interior of North America. We investigated the relationship between river channel width and tern and plover nesting incidence on the lower Platte River, Nebraska, using a model-based logistic regression analysis. Multiple channel width measurements and a long-term nesting data set were used in the analysis. Nesting incidence was positively associated with increasing river channel width proximal to the nesting site. At a greater distance, up to 802 m away from …
Wetland Hydrodynamics And Long-Term Use Of Spring Migration Areas By Lesser Scaup In Eastern South Dakota, Sharon N. Kahara, Steven R. Chipps
Wetland Hydrodynamics And Long-Term Use Of Spring Migration Areas By Lesser Scaup In Eastern South Dakota, Sharon N. Kahara, Steven R. Chipps
Great Plains Research: A Journal of Natural and Social Sciences (through 2013)
Lesser scaup (Aythya affinis [Eyton]) populations remain below their long-term average despite improved habitat conditions along spring migration routes and at breeding grounds. Scaup are typically associated with large, semipermanent wetlands and exhibit regional preferences along migration routes. Identifying consistently used habitats for conservation and restoration is complicated by irregular wetland availability due to the dynamic climate. We modeled long-term wetland use by lesser scaup in eastern South Dakota based on surveys conducted during below-average (1987-1989) and above-average (1993-2002) water condition years. Wetland permanence, longitude, and physiographic region were all significant determinants of use (P < 0.01). Long-term use was best described by a quadratic equation including wetland surface area variability, an index of wetland hydrodynamics that is linked to productivity, biodiversity, and value to waterfowl. Contrary to previous findings, our study shows that over the long term, lesser scaup are more than twice as likely to use permanent wetlands as they are semipermanent wetlands. The northern region of South Dakota's Prairie Coteau, which holds the highest density of hydrologically dynamic permanent wetlands, should be considered an area of conservation concern for lesser scaup. The criteria we identified may be used to identify important lesser scaup habitats in other regions of the Prairie Pothole Region.
Wpa News 89 (2012), World Pheasant Association
Wpa News 89 (2012), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Spring 2012), number 89
Published by the World Pheasant Association
Bird Red List And Its Future Development In Mongolia, Sundev Gombobaatar, D. Samiya, Jonathan M. Baillie
Bird Red List And Its Future Development In Mongolia, Sundev Gombobaatar, D. Samiya, Jonathan M. Baillie
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
With the involvement of the World Bank, Zoological Society of London, Dutch Government and National University of Mongolia, the volumes of Mongolian Red Lists of Fish, Amphibians and Reptiles, Birds and Mammals were completed, and Mongolia is now among the few nations that have up-to-date conservation assessments for all vertebrates. Of the 476 assessed native bird species of Mongolia, 10% were categorized as regionally threatened including Near Threatened. A further 0.6% were categorized as Critically Endangered (CR), 1.7% as Endangered (EN), 3.3% as Vulnerable (VU), and 4.4% as Near Threatened (NT). Almost 90% of Mongolian birds are categorized as Least …
Nestling Food In The Desert Wheatear Oenanthe Deserti In The Dzungarian Gobi, Mongolia, Ueli Rehsteiner
Nestling Food In The Desert Wheatear Oenanthe Deserti In The Dzungarian Gobi, Mongolia, Ueli Rehsteiner
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
The quality and size of nestling food of the Desert Wheatear Oenanthe deserti ssp. atrogularis were investigated in the spring of 2001 in the Dzungarian Gobi in Mongolia. Data are based on observations of nine pairs. Nestling food consisted of several taxa caught on the ground and in the air. Diptera, Coleoptera larvae, and Hymenoptera were the most frequent prey, that is, they contributed 17 to 30% of all food items each. The food composition changed with nestling age and season.
Food item size decreased with date. A higher proportion of multiple prey loadings were brought to nestlings in the …
Ecology And Behaviour Of The Black-Billed Capercaillie (Tetrao Urogalloides Stegmanni) In The Khentej Mountains, Mongolia, Siegfried Klaus, Karl-Heniz Schindlatz, Alexander V. Andreev, Hans-Heiner Bergmann
Ecology And Behaviour Of The Black-Billed Capercaillie (Tetrao Urogalloides Stegmanni) In The Khentej Mountains, Mongolia, Siegfried Klaus, Karl-Heniz Schindlatz, Alexander V. Andreev, Hans-Heiner Bergmann
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Introduction
A common inhabitant of East Siberian larch forests, the Siberian or black-billed capercaillie (Tetrao urogalloides) ranges south to the limits of the boreal forests in the northern Mongolian mountains and east to the very coast of the Asian continent (KLAUS et al. 1989). Tetrao urogalloides MIDDENDORF (1851) has priority over T. parvirostris BONAPARTE (1856). Therefore, we prefer the T. urogalloides.
The subspecies T.u. stegmanni was first described on the basis of morphological differences by POTAPOV (1985) using specimens collected during Russian expeditions by KOZLOVA (1930). This description was based on 18 males in the collection at …
Do Clark’S Nutcrackers Demonstrate What-Where-When Memory On A Cache-Recovery Task?, Kristy L. Gould, Amy J. Ort, Alan C. Kamil
Do Clark’S Nutcrackers Demonstrate What-Where-When Memory On A Cache-Recovery Task?, Kristy L. Gould, Amy J. Ort, Alan C. Kamil
Avian Cognition Papers
What-where-when (WWW) memory during cache recovery was investigated in six Clark’s nutcrackers. During caching, both red- and blue-colored pine seeds were cached by the birds in holes filled with sand. Either a short (3 day) retention interval (RI) or a long (9 day) RI was followed by a recovery session during which caches were replaced with either a single seed or wooden bead depending upon the color of the cache and length of the retention interval. Knowledge of what was in the cache (seed or bead), where it was located, and when the cache had been made (3 or 9 …