Skip to main content
Advanced Search

Filters: Tags: birds (X) > Extensions: Citation (X)

499 results (57ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
Whooping cranes (Grus americana) of the Aransas-Wood Buffalo population migrate twice each year through the Great Plains in North America. Recovery activities for this endangered species include providing adequate places to stop and rest during migration, which are generally referred to as stopover sites. To assist in recovery efforts, initial estimates of stopover site use intensity are presented, which provide opportunity to identify areas across the migration range used more intensively by whooping cranes. We used location data acquired from 58 unique individuals fitted with platform transmitting terminals that collected global position system locations. Radio-tagged birds provided 2,158 stopover sites over 10...
Abstract: A significant number of historically existing wetlands that naturally stored rainwater and attenuated flood peaks have now been drained and employed as new farming areas. Beyond the water quality and flow problem, this has resulted in loss of natural habitats of diverse ecological species. Restoring wetlands have hence been proposed as a potential conservation strategy to help attenuate many of these problems. In this study a spatial, multi-objective optimization study of new potential wetlands was carried out to achieve biodiversity improvements in addition to flood reduction benefits and water quality improvements. The Soil and Water Assessment Tool (SWAT) was used to simulate flow and water quality,...
Abstract (from ESA): Estimating population size and resource selection functions (RSFs) are common approaches in applied ecology for addressing wildlife conservation and management objectives. Traditionally such approaches have been undertaken separately with different sources of data. Spatial capture–recapture (SCR) provides a hierarchical framework for jointly estimating density and multi‐scale resource selection, and data integration techniques provide opportunities for improving inferences from SCR models. Despite the added benefits, there have been few applications of SCR‐RSF integration, potentially due to complexities of specifying and fitting such models. Here, we extend a previous integrated SCR‐RSF model...
Concern over global environmental change and associated uncertainty has given rise to greater emphasis on fostering resilience through forest management. We examined the impact of standard silvicultural systems (including clearcutting, shelterwood, and selection) compared with unharvested controls on tree functional identity and functional diversity in three forest types distributed across the northeastern United States. Sites included the Argonne, Bartlett, and Penobscot Experimental Forests located in Wisconsin, New Hampshire, and Maine, respectively. We quantified functional trait means for leaf mass per area, specific gravity, maximum height, height achieved at 20 years, seed mass, drought tolerance, shade tolerance,...
The global mean surface temperature increased 0.85°C during the period 1880 – 2012. Some climate models predict an additional warming of up 2 to 4 ◦ C over the next 100 years for the primary breeding grounds for North American ducks. Such an increase has been predicted to reduce mid - continent breeding duck populations by >70%. Managing continental duck populations in the face of climate change requires understanding how waterfowl have responded to historical spatio - temporal climatic variation. However, such responses to climate may be obscured by how ducks respond to variation in land cover. We estimated effects of climate on settlement patterns of breeding ducks in the Prairie - Parkland Region (PPR), boreal...
Conclusions:Owls avoided agricultural lands (due to prey availability), used grass-forb areas for foraging, and avoided croplands and grazed pasture. 95% of all movements occurred within 600 meters of the nest burrows.Thresholds/Learnings:At a minimum, a 600m radius should be maintained around burrowing owl nests in order to ensure the survival of burrowing owls
Conclusions:The Sprague's pipit tends to occupy native grassland habitats containing very little or no woody vegetation, with non-native areas populated to a significantly lower extentThresholds/Learnings:
thumbnail
Synopsis: Prior to European settlement, the Northern Mixed-grass Prairie was a mosaic of wetland, grassland and grass-shrub habitats, with riparian and floodplain forests along major drainages. Even today, the physiographic area can be characterized as being one of the largest still relatively intact grassland landscapes that persist in North America. It is the continent’s most important production area for waterfowl and is the heart of the breeding range for some of North America’s rarest species of grassland birds. A comparison of relative abundance estimates among physiographic areas sampled by the North American Breeding Bird Survey indicates that more than 40% of the world’s population of Baird’s Sparrows,...
Climate change is affecting species and ecosystems across the Northeast and Midwest U.S. Natural resource managers looking to maintain ecological function and species persistence have requested information to improve resource management in the face of climate change. Leveraging the research that has already been supported by the Northeast Climate Adaptation Science Center and its partners, this project used the latest modeling techniques combined with robust field data to examine the impact of specific climate variables, land use change, and species interactions on the future distribution and abundance of species of conservation concern. An interdisciplinary team worked to understand the mechanisms that are driving...
An online database allowing users to search 21 journals as well as theses and dissertations pertaining to ornithology. One reference to use to look at long-term records for bird species recorded in North American Birds (formerly Birde Lore, Audubon Field Notes and American Birds).
thumbnail
A bald eagle survey protocol specific to LACL was developed and implemented in 1999. Intensive surveys to locate new nests and check the status of existing nests will be conducted in 3 survey areas on a yearly rotational basis. In 2001, the bald eagle early occupancy surveys (EOS) were conducted on nests known to be active or occupied during 2000 and 1999. The late productivity surveys (LPS) were conducted utilizing the active and occupied nests found during the 2001 EOS.
thumbnail
We documented the occurrence of eight rare passerines in central Alaska. Our observations of the Yellow-bellied Flycatcher, Red-breasted Nuthatch, Arctic Warbler, Golden-crowned Kinglet, Tennessee Warbler, Palm Warbler, Mourning Warbler, and Clay-colored Sparrow provided new distributional information on the occurrence of these species in central Alaska. Mist netting [not a spray, just a light net] was essential to documenting the geographic distribution of these species because mist-net captures represented the only occurrence of several species. Additionally, many of these records could not have been identified to subspecies without collecting individuals as voucher specimens that could be verified by other scientists.
thumbnail
Status of breeding bird fauna based on the World Conservation Union (IUCN) Red List Index (RLI) method in British Columbia, Canada, was studied. The use of index to measure the trend in the status of indigenous breeding birds in British Columbia between 1992 and 2006 was examined. Ongoing immigration of bird species in and out of British Columbia added to the complexity of interpreting the regional RLI-type index. Because the RLI was scaled so that maximum value was based on a state in which all species were simultaneously ranked as least concern, it might exaggerate the highest potential status of intrinsically vulnerable species. The results concluded that the RLI approach holds useful innovation for an indicator...
map background search result map search result map Partners in Flight Bird Conservation Plan for Northern Mixed-Grass Prairie UMRGLR JV - Wetland Breeding Bird Habitat Priorities Biogeography of select avian species in Alaska’s National Parks TREE SWALLOWS TRADE OFF IMMUNE FUNCTION AND REPRODUCTIVE EFFORT DIFFERENTLY ACROSS THEIR RANGE Trend in the Status of Breeding Bird Fauna in British Columbia, Canada, Based on the IUCN Red List Index Method Updated geographic distribution of eight passerine species in central Alaska Integrated Analysis of Genetic, Stable Isotope, and Banding Data Reveal Migratory Connectivity and Flyways in the Northern Yellow Warbler (Dendroica petechia; Aestiva group) Yukon Southern Lakes Nest Box Project Report, 2000 Herbivores - Forest grouse and ptarmigan Raptor populations inventory - bald eagles TREE SWALLOWS TRADE OFF IMMUNE FUNCTION AND REPRODUCTIVE EFFORT DIFFERENTLY ACROSS THEIR RANGE Integrated Analysis of Genetic, Stable Isotope, and Banding Data Reveal Migratory Connectivity and Flyways in the Northern Yellow Warbler (Dendroica petechia; Aestiva group) Herbivores - Forest grouse and ptarmigan Raptor populations inventory - bald eagles Yukon Southern Lakes Nest Box Project Report, 2000 Updated geographic distribution of eight passerine species in central Alaska Partners in Flight Bird Conservation Plan for Northern Mixed-Grass Prairie UMRGLR JV - Wetland Breeding Bird Habitat Priorities Trend in the Status of Breeding Bird Fauna in British Columbia, Canada, Based on the IUCN Red List Index Method Biogeography of select avian species in Alaska’s National Parks