Barrett A. Garrison, Resource Assessment Program, California Department of Fish and Game, North Central Region 20070321 Version 1 vector digital data ftp://ftp.dfg.ca.gov/BDB/GIS/BIOS/Public_Datasets/200_299/ds294.zip http://bios.dfg.ca.gov These data are point locations where hawks and owls (raptors) were detected during playback surveys conducted between 28 March 2005 and 21 July 2005 along 36 randomly selected watercourses in the foothills of the Sierra Nevada Mountain Range. These data represent 260 positive responses for several species of hawks and owls to the playback surveys. This study was done by the North Central Region of the California Department of Fish and Game with support from the Resource Assessment Program. These data represent the point locations where individual hawks and owls were detected based on geographic algorithms using estimated distances and compass bearings from fixed points along public roads. Methodology: Playback surveys using MP3 players and battery-powered speakers were done to elicit vocal or behavioral responses from hawks and owls from fixed points along public roads in the foothills of the Sierra Nevada. The surveys were done along 36 randomly selected watercourses, and one or three surveys were done at the points between March and July 2005. Seventeen watercourses had one survey while 19 watercourses had three surveys. Survey periods were (1) March to mid-April, (2) late April to late May, and (3) June to July. Watercourses with one survey were surveyed during the March to mid-April period; watercourses with one survey were dropped from the study after the first survey due to logistic and manpower constraints. Each watercourse had 3-5 fixed points that were between 500-1,000 meters apart to ensure spatial independence. Hawk surveys were conducted between 8:00 am and 5:00 pm, while owl surveys were conducted between 8:30 pm and 4:15 am. Playback surveys were done with fixed sequences of species calls as follows: (1) for hawks, sharp-shinned hawks, Cooper's hawks, and red-shouldered hawks; and (2) for owls, flammulated owl (starting in May), northern saw-whet owl, northern pygmy-owl, western screech-owl, long-eared owl, and great-horned owl. No calls were done for red-tailed hawks, osprey, Swainson's hawks, or barn owls which were detected during the surveys and included in these data. The duration of the playbacks for each species consisted of a 1-minute silent period, a 4-minute playback period with 4 repeated sequences of 30 seconds of vocalizations followed by 30 seconds of silence, and a 1-minute silent period. The speaker initially faced North, and was then rotated South, West, and East with successive 30-second playback/30-second silence periods. Detected animals were visually or aurally located and identified. Laser rangefinders were used to estimate distances, while compasses were used to derive compass bearings. Habitats of detected animals were determined from field observations during the day for hawks or from aerial photographs with owls based on knowledge of field conditions at the fixed points. A GIS algorithm was used to locate the estimated field locations based on the estimated distances and compass bearings, and then habitats were verified with aerial photographs. The sex and age of each detected individual was determined if possible, and observers rated the confidence of their determination of the number of individuals, species type, sex and age of each detection. The data were part of a larger study of wildlife use of riparian habitat along Sierra Nevada watercourses. Other data from this study include point counts of birds from the same fixed points. The raptor data are separate from the point count bird and habitat data collected from the larger study. 28 March 2005 21 July 2005 ground condition Complete As needed -121.594408 -120.475186 39.691291 38.083431 None northern pygmy-owl northern saw-whet owl long-eared owl osprey barn owl sharp-shinned hawk red-tailed hawk flammulated owl owl great horned owl western screech-owl red-shouldered hawk raptor Swainson's hawk Cooper's hawk hawk ISO 19115 Topic Category biota environment None Butte El Dorado Placer Amador California Sierra Nevada Mountain Range Calaveras Yuba Nevada Public use. These data can be used without constraints. Resource Assessment Program, California Department of Fish and Game, North Central Region Barrett A. Garrison Staff Environmental Scientist mailing

North Central Region

California Department of Fish and Game

1701 Nimbus Road

Rancho Cordova CA 95670 (916) 358-2945 (916) 358-2912 bgarrison@dfg.ca.gov Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959 It is assumed that these species were accurately identified by vocalization and/or visually. The confidence of each observation with regard to the species' identification is indicated in the file. It is assumed that the detection of a species is a unique location for each animal found during each survey period. These observations resulted from multiple surveys so a cluster of points for a species could be repeat observations of the same individual in the same general area. These observations represent point locations for animals that are highly mobile so it is unlikely that these animals will be found again at the same spot indicated in this file. Repeat surveys of the same areas, however, may result in detections of these same species. All data are complete except for the specific time of the observation. Observations were derived from the best field estimates of the observers of the animal's fixed location at the time of detection. Compass bearings were measured with handheld compass, and distances were estimated with laser rangefinders. Observations are assumed accurate within 25 m. Owls were detected at night so spatial accuracy of their points is lower than hawks which were detected during the day. A GIS algorithm was used to derive the actual locations from fixed survey points on the ground based on the compass bearings and estimated distances. Gathered and entered field data from field observations, and then created an ArcView shapefile based on a GIS algorithm using compass bearings and detection distances to derive individual point locations. California Department of Fish and Game Barrett A. Garrison bgarrison@dfg.ca.gov Vector Entity point 260 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.000000003754707655900803 0.000000003754707655900803 meter D North American 1983 GRS 1980 6378137.0 298.257222101 ds294 Riparian Area Raptors - Sierra Nevada Foothill [ds294] FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. DETECTDATE Date of detection. SNAME Scientific name of detected species. CNAME Common name of detected species. TYPEDETECT Type of detection. DETECTNUM Number of individual birds detected during the playback surveys. DETECTSEX Sex determination of detected individual bird. DETECTAGE Age of detected individual bird. DETECTCONF Observer's confidence in their observation. DETECTHAB Habitat where the species was detected based on the CWHR habitat classification system. LATDD Latitude of location. LONDD Longitude of location. The point data shown represent observations of several species of hawks and owls from watercourses in the foothills of the Sierra Nevada Mountain Range in California. Each observation record is a unique observation of an individual hawk or owl that responded vocally or behaviorally to playback surveys. Surveys were done on 36 randomly selected watercourses with 3-5 sample stations along each watercourse that were 500-1,000 m apart. Biogeographic Data Branch, California Department of Fish and Game Gordon Gould mailing

California Department of Fish and Game

1416 Ninth St., 12th floor

Sacramento CA 95814 (916) 445-5006 (916) 324-0475 ggould@dfg.ca.gov Neither the State of California nor the California Department of Fish and Game warrant the correctness or accuracy of the observation data presented in here. They are used at the user's own risk. ArcView shapefile, Ver. 3.2. None Contact Distributor. 1-2 weeks 20160229 Resource Assessment Program, California Department of Fish and Game, North Central Region Barrett A. Garrison mailing

North Central Region

1701 Nimbus Road

California Department of Fish and Game

Rancho Cordova CA 95670 (916) 358-2945 (916) 358-2912 bgarrison@dfg.ca.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time