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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,...
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...
Aeroecology focuses "on the planetary boundary layer, or aerosphere, and the myriad of organisms that, in large part, depend upon this environment for their existence" (Kunz et al. 2008). The primary mission of the Aeroecology Community is to act as a clearing house for remotely sensed data related to biological use of the aerosphere. This community aims to provide biological data collected from weather radar, portable radar, thermal imaging, and other applicable and emerging technologies.
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This landcover raster was generated through a Random Forest predictive model developed in R using a combination of image-derived and ancillary variables, and field-derived training points grouped into 18 classes. Overall accuracy, generated internally through bootstrapping, was 75.5%. A series of post-modeling steps brought the final number of land cover classes to 28.
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Training points collected in the field between 2012 and 2013 were grouped into 18 classes: Forested Burn (66), Foothill Woodland Steppe Transition (73), Greasewood Flat (73), Greasewood Steppe (239), Greasewood Sage Steppe (277), Great Plains Badlands (166), Great Plains Riparian (255), Low Density Sage Steppe (776), Medium Density Sage Steppe (783), Mixed Grass Prairie (555), Mixed Grass Prairie Burned (278), Ponderosa Pine Woodland and Shrubland (512), Riparian Floodplain (223), Semi-Desert Grassland (103), Sparsely Vegetated Mixed Shrub (252), Silver Sage Flat (70) , Silver Sage Steppe (64), and Water (246). When insufficient field data were available for a class, we augmented it through photointerpretation of...
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Appropriate ecological indicators of climate change can be used to measure concurrent changes in ecological systems, inform management decisions, and potentially to project the consequences of climate change. However, many of the available indicators for North American birds do not account for imperfect observation. We propose to use correlated-detection occupancy models to develop indicators from the North American Breeding Bird Survey data. The indicators will be used to test hypotheses regarding changes in range and distribution of breeding birds. The results will support the Northeast Climate Science Center’s Science Agenda, including the science priority: researching ecological vulnerability and species response...
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Hermit Warbler - VizBand/Land AIC Model Selection Created: 12-Aug-2011 Hermit Warbler annual capture rate of adult (ADULT) individuals (log transformed) ranged between -0.281 and +2.243 with a mean value of +0.981 and a median value of +0.875. ________________________________________ Model 1 (3 parameters) Hermit Warbler annual capture rate of adult (ADULT) individuals (log transformed) was a function of: a) GTOPO30_AL (+0.20641) - elevation (m), ranged between +5.119 and +8.376 (95% CL) with a mean value of +6.747 and a median value of +7.137, b) NLCD06AG5KP (-0.19572) - percent agricultural/grassland cover, 990m-resolution in a landscape context of 5km radius, ranged between -0.657 and +2.530 (95% CL) with a mean...
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Introduction : Swainson’s Thrush is a medium sized (15-18cm) thrush which prefers to breed in dense shrub growth associated with spruce-fir forests. The "russet-backed" race prefers mixed forests and deciduous riparian woodlands of the coastal region from British Columbia, to northern California. These Pacific populations winter in mature tropical and secondary forests of Central America, whereas the "olive-backed" race that breeds in the Boreal and Rockies winters in S. America. Models of Monitoring Avian Productivity and Survival (MAPS) demographic data and high-resolution land cover data showed that Swainson’s Thrush prefers large intact forest patches with low perimeter to area ratios. On a regional...
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During the period 1970-2000, substantial efforts were made to document the distribution and number of Trumpeter Swans (Cygnus buccinator) in western Canada. Breeding surveys have expanded from covering less than 20,000 km2 in the Grande Prairie region of Alberta to cover 780,000 km2, perhaps one-third of northwestern Canada. Aerial surveys involving total or partial counts have been used in most areas. Since 1995, sample-based surveys have been used in Yukon Territory and extreme northern British Columbia. Between 1970 and 2000, breeding surveys have documented a dramatic increase in both breeding distribution and numbers in western Canada (100 to more than 3,700). Winter surveys in British Columbia have corroborated...
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In 2011 through 2013, when nests were found, notes were kept on whether it held eggs or hatchlings at the time of discovery, and how it was found. Ammodramus savannarum ammolegus (commonly referred to as the Arizona Grasshopper Sparrow) occurs in the desert and plains grasslands of southeastern Arizona, southwestern New Mexico, and northern Sonora, Mexico. Although a subspecies of conservation concern, this data was produced as part of the first intensive study of its life history and breeding ecology, providing baseline data and facilitating comparisons with other North American Grasshopper Sparrow subspecies. This study is described in the publication listed in the larger work citation of this metadata record.
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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.
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).
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,...


map background search result map search result map Partners in Flight Bird Conservation Plan for Northern Mixed-Grass Prairie Hermit Warbler (ADULT) Swainson's Thrush - Predicted Productivity Index Avian Indicators of Climate Change Based on the North American Breeding Bird Survey Aeroecology Charles M. Russell National Wildlife Refuge Spot Landcover Classification in Relation to Greater Sage Grouse Biogeography of select avian species in Alaska’s National Parks Trumpeter Swan Numbers and Distribution in Western Canada, 1970-2000 Yukon Southern Lakes Nest Box Project Report, 2000 Raptor populations inventory - bald eagles Training Points How nests found Arizona 2011-2013 How nests found Arizona 2011-2013 Training Points Charles M. Russell National Wildlife Refuge Spot Landcover Classification in Relation to Greater Sage Grouse Raptor populations inventory - bald eagles Yukon Southern Lakes Nest Box Project Report, 2000 Partners in Flight Bird Conservation Plan for Northern Mixed-Grass Prairie Biogeography of select avian species in Alaska’s National Parks Trumpeter Swan Numbers and Distribution in Western Canada, 1970-2000 Avian Indicators of Climate Change Based on the North American Breeding Bird Survey Swainson's Thrush - Predicted Productivity Index Hermit Warbler (ADULT)