scholarly journals Snow Meltout Dates and Breeding Density in Brewer's Sparrows (Spizella Breweri)

2008 ◽  
Vol 31 ◽  
pp. 19-21
Author(s):  
Martin Cody
Keyword(s):  
Census Data ◽  
Monitoring Program ◽  
Bird Species ◽  
Common Species ◽  
Breeding Density ◽  
Breeding Bird ◽  
Data Set ◽  
Bird Monitoring ◽  
Fixed Area ◽  
Spizella Breweri

We have conducted a breeding bird monitoring program in GTNP since the early 1990s, utilizing fixed-area census sites of around 5 ha in size. The sites are located throughout the park in all habitat types and elevations, and number 30 in all. Some have been censused each year in June, at the height of the breeding season, others have been censused repeatedly but more sporadically, and others less frequently. the power of these census data to interpret variation in bird species, composition and breeding densities, species to species, site to site and especially year to year, clearly increases with the longevity of the data set. With the data from some sites now covering 18 successive years (1991-2008), it is possible to attempt some interpretation of the bird species variables. One such is reported here. The influence of snow meltout date on breeding density of a common species of the sagebrush flats, Brewer's Sparrow Spizella breweri.

scholarly journals ENSO Signals Contribute to Variations in Breeding Bird Densities in Grand Teton Nationl Park

2009 ◽  
Vol 32 ◽  
pp. 21-25
Author(s):  
Martin Cody
Keyword(s):  
Census Data ◽  
Bird Species ◽  
Breeding Bird ◽  
Data Set ◽  
Wide Range ◽  
Fixed Area ◽  
Migrant Birds ◽  
The Subject ◽  
Breeding Seasons ◽  
Preceding Winter

We have monitored breeding bird densities over a variety of sites and habitats in GTNP since the early 1990s, utilizing fixed-area census sites of around 5 ha in size. The sites are located throughout the park in all habitat types and over a wide range of elevations, and number 30 in all. At some of these monitoring sites we have accumulated data in successive breeding seasons for almost two decades; the power of these census data in interpreting variation in bird species composition and breeding densities, species to species, site to site, and especially year to year, clearly increases with the span of the data set. Some of the measured variation in breeding densities is presumably attributable to conditions encountered by resident birds during the preceding winter, on-site in GTNP. Some may be attributable to conditions evaluated by migrant birds returning to GTNP after wintering elsewhere, also an on-site contribution. However, a further potential source of variation is off-site, and may be ascribed to conditions endured by the migrants on their wintering grounds. It is the source and extent of such variation in the winter habitats of GTNP migrants that is the subject of the ensuing discussion.

scholarly journals Bird interactions with drones, from individuals to large colonies

2017 ◽  
Author(s):  
Mitchell Lyons ◽  
Kate Brandis ◽  
Corey Callaghan ◽  
Justin McCann ◽  
Charlotte Mills ◽  
...  
Keyword(s):  
Bird Species ◽  
Urban Environments ◽  
Breeding Birds ◽  
Future Research ◽  
Natural Environments ◽  
Breeding Bird ◽  
Bird Monitoring ◽  
Commercial Applications ◽  
Study Sites ◽  
Bird Colonies

AbstractDrones are rapidly becoming a key part of the toolkit for a range of scientific disciplines, as well as a range of management and commercial applications. This presents a number of challenges in context of how drone use might impact nearby wildlife. Interactions between birds and drones naturally come to mind, since they share the airspace. This paper details initial findings on the interactions between drones and birds for a range of waterbird, passerine and raptor species, across of a range of scientific applications and natural environments. The primary aims of this paper are to provide guidance for those planning or undertaking drone monitoring exercises, as well as provide direction for future research into safe and effective monitoring with drones. Our study sites we all located within Australia and spanned a range of arid, semi-arid, dunefield, floodplain, wetland, woodland, forest, coastal heath and urban environments. We particularly focus on behavioral changes towards drones during breeding season, interactions with raptors, and effects on nesting birds in large colonies – three areas yet to be explored in published literature. In over 70 hours of flight, there were no incidents with birds. Although some aggressive behavior was encountered from solitary breeding birds. Several large breeding bird colonies were surveyed, and included in our observations is monitoring and counting of nests in a colony of over 200,000 Straw-necked Ibis, the largest drone-based bird monitoring exercise to date. In addition to providing observations of interactions with specific bird species, we recommend procedures for flight planning, safe flying and avoidance. This paper also provides a basis for a number of critical and emerging areas of research into bird-drone interactions, most notably, territorial breeding birds, safety around large raptors, and the effect of drones on the behaviour of birds in large breeding colonies.

scholarly journals Monitoring Breeding Bird Populations in Grand Teton National Park

1996 ◽  
Vol 20 ◽  
pp. 35-38
Author(s):  
Martin Cody
Keyword(s):  
National Park ◽  
Information Source ◽  
Monitoring Program ◽  
Bird Species ◽  
Breeding Bird ◽  
Grand Teton National Park ◽  
Subalpine Fir ◽  
Bird Populations ◽  
Breeding Populations ◽  
Jackson Hole

This report covers year 2 of a three year project, 1995-1997 inclusive, to instigate a permanent program of monitoring landbird species composition and densities in a variety of representative habitats within Grand Teton National Park (GTNP). Habitats range from grassland and sagebrush on the valley floor of Jackson Hole (around 1900 m) through a range of scrub, woodland, and tall foothill forest vegetation types to montane sites of subalpine fir and tundra (ca. 3000 m). The monitoring program is intended to provide data on year-to-year fluctuations in breeding bird species and densities, and document longer-term changes (if any) in the local avifauna of resident and migratory species. The data base will document variability in size of breeding populations among years, local shifts in distribution and abundance over habitat types, and potentially form an information source on which management and conservation decisions might be based.

scholarly journals Effects of Prescribed Burns and Bison (Bos Bison) Grazing on Breeding Bird Abundances in Tallgrass Prairie

The Auk ◽  
2006 ◽  
Vol 123 (1) ◽  
pp. 183-197 ◽  
Author(s):  
Alexis F. L A. Powell
Keyword(s):  
Tallgrass Prairie ◽  
Grassland Birds ◽  
Bird Species ◽  
Breeding Bird ◽  
Data Set ◽  
Prescribed Burns ◽  
Grasshopper Sparrow ◽  
Flint Hills ◽  
Bos Bison ◽  
Henslow's Sparrow

Abstract Grassland birds have declined more than any other avian assemblage in North America, with nearly every species showing negative population trends. In the Flint Hills of Kansas, the largest remnant of the tallgrass prairie biome, annual spring burning of rangeland has recently replaced burning every 2–3 years. I examined effects of different burning and bison (Bos bison) grazing regimes on June abundances of seven bird species using a 23-year data set from the Konza Prairie Biological Station. Fire significantly affected the abundances of six of the seven species. Effects varied among species but, notably, four grass-dependent species—Grasshopper Sparrow (Ammodramus savannarum), Henslow’s Sparrow (A. henslowii), Dickcissel (Spiza americana), and Eastern Meadowlark (Sturnella magna)— and the shrub-dependent Bell’s Vireo (Vireo bellii)—were least abundant or absent at sites in the breeding season immediately following burning. Upland Sandpipers (Bartramia longicauda) were most abundant at sites in the season following burning, whereas Brown-headed Cowbirds (Molothrus ater) exhibited no significant response. Bison grazing increased abundance of Upland Sandpiper and Grasshopper Sparrow, nearly eliminated Henslow’s Sparrow, and (in combination with recent fire) lowered the abundance of Dickcissel. Although fire and grazing are natural forces that maintain tallgrass prairie, their action was, until recently, intermittent and patchy, providing grassland birds with a variety of levels of disturbance. If the vast Flint Hills prairie is to serve as a grassland bird stronghold, the region-wide practice of annual burning with intensive grazing must be replaced with alternatives that restore heterogeneity to the landscape. Efectos de las Quemas Programadas y del Pastoreo de los Bisontes sobre la Abundancia de Aves Reproductivas en Praderas de Pasto Alto

THE DENSITY OF LAND BIRDS ON THE TRES MARÍAS ISLANDS IN MEXICO: II. DISTRIBUTION OF ABUNDANCES IN THE COMMUNITY

1966 ◽  
Vol 44 (6) ◽  
pp. 1023-1030 ◽  
Author(s):  
P. R. Grant
Keyword(s):  
Census Data ◽  
Bird Species ◽  
Common Species ◽  
Bird Communities ◽  
Competitive Species

Census data from the Tres Marías Islands and adjacent mainland have been applied to a model which predicts the abundance of bird species in a community. The mainland data fit the model; the island data do not. The most common species on the islands is considerably more common than predicted. Departure from prediction of this type is a feature of several island bird communities, and is related to the number of bird species in the community. The considerable abundance of the most common species on islands is considered to be indicative of the opportunities afforded by the absence of potentially competitive species and by paucity of predator species.When species which are ecologically similar and in the same genus occur together on islands they differ in density by a greater amount than do their mainland counterparts. This is attributed to a greater need for exploiting different resources on the island than on the mainland because of the restricted nature of the former.

scholarly journals Interannual dynamics of breeding bird assemblage within the Central Botanical Garden of the National Academy of Sciences of Belarus (Minsk)

2020 ◽  
pp. 66-74
Author(s):  
Vital V. Sakhvon ◽  
Karyna A. Fedorynchik
Keyword(s):  
Census Data ◽  
Bird Species ◽  
Botanical Garden ◽  
National Academy Of Sciences ◽  
Cyanistes Caeruleus ◽  
Breeding Bird ◽  
Bird Density ◽  
Interannual Dynamics ◽  
Bird Assemblage ◽  
Academy Of Sciences

We studied the dynamics of the composition and diversity of breeding bird assemblage within the Central Botanical Garden of the National Academy of Sciences of Belarus in Minsk during 2016–2019 and compared with census data from breeding seasons of 1982–1985 and 1991–1992. Total 86 species were recorded and the breeding was confirmed for 59 of them. The interannual dynamics of breeding density for 42 species is analysed. Overall bird densities varied from 2.03 pairs/ha to 8.76 pairs/ha during single year; 16 species (Fringilla coelebs, Erithacus rubecula, Turdus merula, T. philomelos, T. pilaris, Parus major, Cyanistes caeruleus, Sylvia atricapilla, S. borin, S. curruca, Phylloscopus sibilatrix, Ph. collybita, Ph. trochilus, Sturnus vulgaris, Pica pica and Columba palumbus) were shown to be the dominants in assemblage during these years. We found that there was increased in species richness (17 new breeding species appeared, 2 breeding species disappeared) and the overall breeding bird density (by almost 3– 4 times) since 1982. The main factors explaining the dynamics of some assemblage characteristics such as synurbization of some bird species and change in habitat structure are discussed.

scholarly journals bbsBayes: An R Package for Hierarchical Bayesian Analysis of North American Breeding Bird Survey Data

2020 ◽  
Author(s):  
Brandon P.M. Edwards ◽  
Adam C. Smith
Keyword(s):  
North American ◽  
Monitoring Program ◽  
Bird Species ◽  
R Package ◽  
The United States ◽  
United States Geological Survey ◽  
Hierarchical Bayesian ◽  
Breeding Bird Survey ◽  
Breeding Bird ◽  
Bird Survey

AbstractThe North American Breeding Bird Survey (BBS) is the primary ecological monitoring program used to assess the population, status, and trend of North American birds. As such, accessible analysis of BBS data is crucial to wildlife conservation/management and ecological science in North America. The R package bbsBayes was developed as a wrapper for the analysis of BBS data using hierarchical Bayesian models, including the models currently used by the Canadian Wildlife Service and the United States Geological Survey. The goal of bbsBayes is to provide an accessible package for anyone in the conservation community to estimate population trajectories (time-series) and trends (rates of change) for any of the 400+ bird species monitored by the BBS, and to allow more advance users to easily access the data and model-templates necessary to customize an analysis for their research.

scholarly journals Monitoring Breeding Bird Populations in Grand Teton National Park

1994 ◽  
Vol 18 ◽  
pp. 42-45
Author(s):  
Martin Cody
Keyword(s):  
National Park ◽  
Monitoring Program ◽  
Bird Species ◽  
Migratory Species ◽  
Breeding Bird ◽  
Grand Teton National Park ◽  
Subalpine Fir ◽  
Bird Populations ◽  
Jackson Hole ◽  
Management And Conservation

The central aim of this project is to instigate a permanent program of monitoring landbird species composition and densities in a variety of representative habitats within Grand Teton National Park (GTNP). Habitats range from grassland and sagebrush on the valley floor of Jackson Hole (around 1900 m) through a range of scrub, woodland, and tall foothill forest vegetation types to montane sites of subalpine fir and tundra (ca. 3000 m). The monitoring program will provide data on year-to-year fluctuations in breeding bird species and densities, and eventually on any longer-term changes in the local avifauna, of both resident and migratory species; the data base will further understanding of population variability, local shifts in distribution and abundance, and potentially form a source for management and conservation decisions.

scholarly journals Breeding Bird Popluations in Grand Teton National Park: Density and Distribution

1995 ◽  
Vol 19 ◽  
pp. 19-23
Author(s):  
Martin Cody
Keyword(s):  
Data Base ◽  
National Park ◽  
Monitoring Program ◽  
Breeding Bird ◽  
Grand Teton National Park ◽  
Bird Populations ◽  
Bird Monitoring ◽  
Census Techniques ◽  
Monitoring Protocols ◽  
Changes Over Time

GTNP (Grand Teton National Park) recently initiated a breeding bird monitoring program, with a view toward assessing population densities of breeding birds and their potential changes, both of residents and neotropical migrants; the 1995 season was the first in which the monitoring protocols of the program were fully instigated. The program goals are the monitoring of both species and densities over a broad range of habitats within the park, with a view to detecting changes over time in these variables, in year-to-year "background" variation and in possible long-term trends. Site selection, mapping and marking, and deployment of various bird census techniques, will be completed and refined over three introductory years, 1995-1997. Thence, it is anticipated that the monitoring program will become permanently established, contributing yearly to an expanding data base on the park's breeding bird populations. This data base, it is believed, will become a useful backup and basis for management decisions, and an increasingly sensitive index from which changes in the park's avifauna, natural or anthropogenic, can be calibrated.

scholarly journals Indirect effects of conifer release alternatives on songbird populations in northwestern Ontario

1997 ◽  
Vol 73 (1) ◽  
pp. 107-112 ◽  
Author(s):  
John Woodcock ◽  
John P. Ryder ◽  
R. A. Lautenschlager ◽  
F. Wayne Bell
Keyword(s):  
Bird Species ◽  
Growing Season ◽  
Common Species ◽  
Post Treatment ◽  
Breeding Bird ◽  
Northwestern Ontario ◽  
Dendroica Pensylvanica ◽  
Treatment Data ◽  
Major Treatment ◽  
Pre Treatment

The effects of conifer-release alternatives on songbird densities (determined by territory mapping, mist netting, and banding) in four young (four to seven year old) spruce plantations were examined. Twenty to 38 (block dependent) species bred on each treatment block. Post-treatment data revealed no major treatment-related changes in breeding bird species composition. The mean density of all birds decreased from 6.9 pairs ha−1 pre-treatment, to 6.3 pairs ha−1 in the first post-treatment growing season (P > 0.05). Mean densities of the 11 most common species increased by 0.35 ha−1 on the control plots during the first post-treatment growing season, but decreased on treated plots by 1.1 ha−1 (brush saw), 1.6 ha−1 (Silvana Selective), 0.14 ha−1 (Release®) and 0.72 ha−1 (Vision®). Following the conifer-release treatments, Chestnut-sided Warbler (Dendroica pensylvanica) had lower (P < 0.05) mean densities on the brush saw- and Silvana Selective-treated plots than on the control plots and fewer (P < 0.05) female birds were captured in the first post-treatment year. Key words: brush saw, Chestnut-sided Warbler, conifer-release, Fallingsnow Ecosystem Project, glyphosate, mist netting, Silvana Selective, songbirds, territory mapping, triclopyr

Sign in / Sign up

Export Citation Format

Share Document