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Combined population indices of ducks and loons (YKD) and geese and swans (YKG) for the USFWS Region Migratory Bird Management Alaska Yukon-Kuskokwim Delta Aerial Survey study area in a combined csv format. The survey consists of low-level aerial observations of waterfowl on a stratified strip transect design. The resulting data frame is several indices combined over observers (or single observer in years where estimates were not combined) and calculated using a standard ratio estimator. These data are output from the R package AKaerial and are also available within that package, see https://github.com/USFWS/AKaerial.
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The WBPHS is conducted by flying an aircraft along a set of segment lines. (One or more contiguous segments comprise a transect.) The geographic coordinates in WBPHS_Segment_Endpoints.csv represent the beginning and ending points of the segment lines in Alaska and Old Crow Flats (Yukon Territory) strata 1-12. The point coordinates in this file have been incorporated into various products (e.g., a GPS waypoints file) to aid in survey-flight navigation. The coordinates are in decimal degrees, WGS84 datum. The set of segments contained in this file was established in 1964. In the years 1957-1963, the survey design included many, but not all, of these segments. Additional segments were flown in some or all years during...
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In many areas surveyed during the North American WBPHS, ground surveys are conducted in conjunction with the aerial surveys to derive annual visibility correction factors (VCFs) for the aerial survey crews, which are used during analyses to adjust for detection bias. Due to the remoteness of strata 1–12, ground surveys are not conducted there. Instead, a set of fixed VCFs by species and basic habitat type (strata 1–7 = boreal forest; strata 8–11 = tundra; stratum 12) are used. The fixed VCFs that were used through 1991 were derived from work done in WBPHS prairie strata. During the years 1985–1991, efforts were made by the FWS Division of Migratory Bird Management-Alaska Region (MBM-Alaska) to develop more appropriate...
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WBPHS_Stratum_Areas.csv is a table that lists the area measurements (in square miles) for strata 1-12, as measured and adopted by survey designers in 1974. These measurements are used by MBM-AK in analyses to produce bird abundance estimates by species and stratum.
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Album caption and index card: The panorama from Point Sublime. View is about southeast along the axis of the Kaibab upwarp. In the distant skyline, right, is San Francisco Mountain and other volcanoes in the volcanic field south of the Grand Canyon. The plateau surface is Permian limestone (Kaibab Limestone); the canyon walls seen in this view are mostly the Permian, Pennsylvanian, and Mississippian Formation. Altitude of the rim here is about 8,200 feet; bottom of the canyon (out of sight) is below 3,000 feet. San Francisco Mountain, about 70 miles away, is above 12,600 feet. Grand Canyon National Park. Coconino County, Arizona. n.d. (Sketch by W.H. Holmes). Published as Plate 28, U.S. Geological Survey. Monograph...
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Album caption and index card: Restoration of a pueblo community house in Parunuweap Canyon, based on a study of ruins. Zion National Park. Washington County, Utah. n.d. (Sketch by B. Wetherill, National Park Service). Published as Figure 19 in U.S. Geological Survey. Professional Paper 220. 1950.
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The Waterfowl Breeding Population & Habitat Survey (WBPHS) has been conducted annually since 1955 (1957 in Alaska) by the U.S. Fish and Wildlife Service (FWS) and Canadian Wildlife Service to estimate the spring abundance of targeted waterfowl species in their principal breeding areas of North America. The survey results are used to establish annual hunting regulations in the United States and Canada, monitor population trends, and inform various conservation and management decisions at the state, flyway, and continental levels. The Waterfowl Program in the FWS Division of Migratory Bird Management-Alaska Region (MBM-Alaska) is responsible for surveying strata 1–12 of the WBPHS during May to June of each year (i.e.,...
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Death Valley National Park, California. Travertine deposits at dry springs along the Furnace Creek fault zone. Two levels of the travertine can be seen. The lower one (tl) drapes over the side of Furnace Creek Wash (foreground) and reaches the floor of the valley. The upper travertine (tu) forms the bench at the skyline in the center. Pre-pottery type projectile points were found on the travertine. Circa 1960. Figure 56, U.S. Geological Survey Professional paper 494-A. Sketch of portion of photo.
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EstimatesTableWBPHS_20220125.csv is a table of bird abundance estimates by year and species, 1957-2021. It was produced by MBM-AK using AKaerial R code and the WBPHS_AK QC transcribed dataset. The date in the file name (format = YYYYMODA, where YYYY = year, MO = month, and DA = day) represents the date that the R code was run to produce the table. A data dictionary and details on analysis methods are provided from the R package AKaerial and are also available within that package, see https://github.com/USFWS/AKaerial.


map background search result map search result map Sketch of the restoration of a pueblo community house in Parunuweap Canyon, Zion National Park, Washington County, Utah. n.d. Death Valley National Park, California. Travertine deposits at dry springs along the Furnace Creek fault zone. Circa 1960. The Old Z, or a portion of the track at the head of Echo before the completion of the tunnel. Summit County, Utah. 1869. Panorama from Point Sublime. Sketch shows a view about southeast along the axis of the Kaibab upwarp. Grand Canyon National Park, Coconino County, Arizona. No date. Nevada 2012 State Wildlife Action Plan Species of Greatest Conservation Need North Carolina 2015 State Wildlife Action Plan Species of Greatest Conservation Need Maryland 2016 State Wildlife Action Plan Species of Greatest Conservation Need California 2007 State Wildlife Action Plan Species of Greatest Conservation Need District of Columbia 2006 State Wildlife Action Plan Species of Greatest Conservation Need Northern Mariana Islands 2005 State Wildlife Action Plan Species of Greatest Conservation Need North Carolina 2005 State Wildlife Action Plan Species of Greatest Conservation Need Ohio 2006 State Wildlife Action Plan Species of Greatest Conservation Need Wyoming 2010 State Wildlife Action Plan Species of Greatest Conservation Need Puerto Rico 2015 State Wildlife Action Plan Species of Greatest Conservation Need Waterfowl Breeding Population and Habitat Survey Alaska-Yukon Waterfowl Breeding Population Habitat Survey Alaska Abundance Estimate data Waterfowl Breeding Population Habitat Survey Alaska Segment Endpoints Waterfowl Breeding Population Habitat Survey Alaska Species Visibility Correction Factors data Waterfowl Breeding Population Habitat Survey Alaska Stratum Areas data Alaska Yukon-Kuskokwim Delta Aerial Survey Combined Index Estimates 1985 to present District of Columbia 2006 State Wildlife Action Plan Species of Greatest Conservation Need Sketch of the restoration of a pueblo community house in Parunuweap Canyon, Zion National Park, Washington County, Utah. n.d. The Old Z, or a portion of the track at the head of Echo before the completion of the tunnel. Summit County, Utah. 1869. Death Valley National Park, California. Travertine deposits at dry springs along the Furnace Creek fault zone. Circa 1960. Northern Mariana Islands 2005 State Wildlife Action Plan Species of Greatest Conservation Need Maryland 2016 State Wildlife Action Plan Species of Greatest Conservation Need Panorama from Point Sublime. Sketch shows a view about southeast along the axis of the Kaibab upwarp. Grand Canyon National Park, Coconino County, Arizona. No date. Alaska Yukon-Kuskokwim Delta Aerial Survey Combined Index Estimates 1985 to present Ohio 2006 State Wildlife Action Plan Species of Greatest Conservation Need North Carolina 2015 State Wildlife Action Plan Species of Greatest Conservation Need North Carolina 2005 State Wildlife Action Plan Species of Greatest Conservation Need Wyoming 2010 State Wildlife Action Plan Species of Greatest Conservation Need Nevada 2012 State Wildlife Action Plan Species of Greatest Conservation Need California 2007 State Wildlife Action Plan Species of Greatest Conservation Need Waterfowl Breeding Population and Habitat Survey Alaska-Yukon Waterfowl Breeding Population Habitat Survey Alaska Abundance Estimate data Waterfowl Breeding Population Habitat Survey Alaska Segment Endpoints Waterfowl Breeding Population Habitat Survey Alaska Species Visibility Correction Factors data Waterfowl Breeding Population Habitat Survey Alaska Stratum Areas data