Swainson's Hawk Nests - CDFW Region 2 [ds696]

File Geodatabase Feature Class

Open this dataset in BIOS

Tags
North Central Region, nesting, Nevada County, San Joaquin County, El Dorado County, nests, survey, Tehama County, California, USA, Swainson's hawk, Colusa County, Glenn County, 2009, Solano County, CDFW Region 2, distribution, relative abundance, biota, Placer County, Yolo County, Sutter County, Sacramento County, Buteo swainsoni, population, raptor, Butte County, Yuba County


Summary

The goals of our survey were two-fold: first, to detect changes in the number of breeding pairs of Swainson's hawks within the study area over the long term, by following on earlier CDFW monitoring efforts. This information will form the basis for comparative analysis with earlier, similarly collected data, which will help gauge the effectiveness of several Habitat Conservation Plans within the Sacramento Valley region. Secondly, we intend to use the results of the survey to refresh the occurrence database of active Swainson's hawk nests. This information may be helpful in making informed land use decisions. This survey was supported by the State Wildlife Grant program.

Description

During the spring and summer of 2009, California Department of Fish and Wildlife (CDFW), North Central Region (Region 2) staff surveyed a portion of the Sacramento Valley and Sacramento/San Joaquin Delta of California for nests of Swainson's hawks. We surveyed 125 randomly selected landscape blocks within the study area (16 percent of the study area), each measuring 5 km by 5 km, for all active Swainson's hawk nests. We followed methods used in the Region's previous Swainson's hawk monitoring (2002). These data map the active Swainson's hawk nests located in the 2009 survey.

Credits

California Department of Fish & Wildlife Resource Assessment Program.

Use limitations

Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.

User's of this data are expected to fully read the metadata and any associated manuscripts and data. These sites do not represent all nest sites within each block surveyed, some were undoubtably missed. Only a random set of 125 landscape blocks of the 781 total blocks within the study area were surveyed in 2009.

Extent

West -122.293089 East -121.055868
North 39.795671 South 37.666284

Scale Range
Maximum (zoomed in) 1:5,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata

Topics and Keywords

Themes or categories of the resource biota


* Content type Downloadable Data


Place keywords North Central Region, Nevada County, San Joaquin County, El Dorado County, Tehama County, California, USA, Colusa County, Glenn County, Solano County, CDFW Region 2, Placer County, Yolo County, Sutter County, Sacramento County, Butte County, Yuba County

Temporal keywords 2009

Theme keywords nesting, nests, survey, Swainson's hawk, distribution, relative abundance, Buteo swainsoni, population, raptor

Theme keywords biota

Thesaurus
Title ISO 19115 Topic Cateogry


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Citation

Title Swainson's Hawk Nests - CDFW Region 2 [ds696]
Publication date 2009-01-01


Presentation formats * digital map


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Citation Contacts

Responsible party
Organization's name California Department of Fish & Wildlife North Central Region, Resource Assessment Program
Contact's role originator


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Resource Details

Dataset languages English(UNITED STATES)


Status completed
Spatial representation type * vector


Supplemental information
In addition, the 2002 and 2009 survey area landscape blocks are available as a polygon shapefile through CDFW's BIOS website http:\\bios.dfg.ca.gov A Microsoft Access database contains further information on the number of young (when seen), surveyors and code tables. CDFW North Central Region GIS. Methods: Study Area The study area includes those portions of the Sacramento Valley and Sacramento/San Joaquin Delta that fall within the California Department of Fish and Wildlife's North Central Region (NCR). To provide continuity with past surveys, we also included areas north and south of the current NCR that were included in past surveys. This is roughly an area of the Central Valley that extends from Chico in the north to Tracy in the south. Our 2009 study area contained 781 five-by-five kilometer survey blocks all of which had at least 50 percent of their area below 500 feet in elevation. Five by five km blocks were chosen for consistency and comparability with past surveys; and results of past surveys have shown that Swainson's hawk nest detections were rare above 500 feet elevation in the Sacramento Valley. Sample Design For 2009, we selected a random sample of 125 survey blocks. The sample was stratified based on nest density. Low density blocks had either zero or one CNDDB record as of 2001 for Swainson's hawk. High density blocks had two or more CNDDB records for Swainson's hawks. Based on a statistical-power analysis for best sample allocation among strata, we randomly selected 97 low-density blocks and 28 high-density blocks for survey within the 2009 study area. Survey blocks within the study area were included regardless of vegetation, land use, or habitat characteristics. Survey Protocol We employed 27 surveyors to survey the 125 survey blocks. Survey protocol required that surveyors drive all of the public roads, or other access routes in the survey block and methodically search for Swainson's hawk nests during the breeding season using binoculars and spotting scopes. Surveyors searched each survey block at least once during each of three survey phases (March-April, May-June, and July). All surveyors were required to attend 2 training sessions where they were trained in Swainson's hawk identification and biology, survey protocols, and survey equipment including GPS, compass and rangefinder. Surveyors were instructed that the objective of the survey was to locate every Swainson's hawk nest within each assigned survey block, involving a complete search of the entire survey block during each of the three phases. The requirement that surveyors search each block at least once in each of the three phases was designed to increase the likelihood of detecting the greatest number of nests in the survey block, as well as gain information about the rate of nest success and the number of chicks produced. In instances where access or visibility prohibited full coverage, the surveyor was instructed to draw a line around any un-surveyable area and label it "un-surveyed" on the block map for later calculation of the un-surveyed area. Only occupied, active Swainson's hawk nests were recorded. Confirmation of an occupied nest consisted of one or more of the following: - Observation of an adult Swainson's hawk in the nest. - Observation of a Swainson's hawk defending the nest. - Observation of a Swainson's hawk carrying food to the nest. - Observation of young Swainson's hawks in and around the nest (species of young verified by presence of adult). When a Swainson's hawk nest was detected, the location of the nest tree was recorded using the coordinate location of the observer as recorded by a handheld GPS unit, a compass bearing to the nest tree, and the distance from the observer's coordinate to the nest tree obtained from a laser range finder. These measures were later entered into a data base which determined the nest tree coordinate based on the input data from the survey form. In order to verify the accuracy of nest locations, the calculated nest coordinate was mapped over current aerial imagery and reviewed by the original surveyor. The surveyor made corrections to the nest location if needed, and the corrected coordinates were recorded in the data base.
* Processing environment Microsoft Windows 10 Version 10.0 (Build 19045) ; Esri ArcGIS 13.1.0.41833


Credits
California Department of Fish & Wildlife Resource Assessment Program.
ArcGIS item properties
* Name ds696
* Size 0.007
* Location file://\\geodata.\\BIOSOnline\Refresh\TODOData\BIOSOnlineData.gdb
* Access protocol Local Area Network

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Extents

Extent
Description
ground condition
Temporal extent
Date and time 2009-01-01

Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -122.293089
* East longitude -121.055868
* North latitude 39.795671
* South latitude 37.666284
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude -196297.599873
* East longitude -92988.821310
* South latitude -36610.161023
* North latitude 198291.468583
* Extent contains the resource Yes

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Resource Points of Contact

Point of contact
Individual's name David Wright
Organization's name California Department of Fish & Wildlife, Resource Assessment Program
Contact's position Staff Environmentalist
Contact's role point of contact


Contact information
Phone
Voice (916) 358-2945

Address
e-mail address David.Wright@wildlife.ca.gov

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Resource Constraints

Constraints
Limitations of use

Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.

User's of this data are expected to fully read the metadata and any associated manuscripts and data. These sites do not represent all nest sites within each block surveyed, some were undoubtably missed. Only a random set of 125 landscape blocks of the 781 total blocks within the study area were surveyed in 2009.


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Spatial Reference

ArcGIS coordinate system
* Type Projected
* Geographic coordinate reference GCS_North_American_1983
* Projection NAD_1983_California_Teale_Albers
* Coordinate reference details
Projected coordinate system
Well-known identifier 3310
X origin -16909700
Y origin -8597000
XY scale 10000
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 0.001
Z tolerance 0.001
M tolerance 0.001
High precision true
Latest well-known identifier 3310
Well-known text PROJCS["NAD_1983_California_Teale_Albers",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",-4000000.0],PARAMETER["Central_Meridian",-120.0],PARAMETER["Standard_Parallel_1",34.0],PARAMETER["Standard_Parallel_2",40.5],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3310]]

Reference system identifier
* Value 3310
* Codespace EPSG
* Version 6.8(9.2.0)


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Spatial Data Properties

Vector
* Level of topology for this dataset geometry only


Geometric objects
Feature class name ds696
* Object type point
* Object count 0

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ArcGIS Feature Class Properties
Feature class name ds696
* Feature type Simple
* Geometry type Point
* Has topology FALSE
* Feature count 0
* Spatial index TRUE
* Linear referencing FALSE

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Data Quality

Scope of quality information
Resource level dataset


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Data quality report - Quantitative attribute accuracy
Measure description
All nest locations in this data set were verified by the surveyors for accuracy +-10 meters.


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Lineage

Process step
When the process occurred 2011-01-01
Description
Edited metadata (added title, keywords)


Process contact
Individual's name Will Patterson
Organization's name California Department of Fish and Game
Contact's role processor


Contact information


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Process step
When the process occurred 2013-09-19
Description
Restructured attribute table to show the most pertinent information at the beginning. Replaced instances of California Department of Fish and Game or DFG with California Department of Fish and Wildlife or CDFW. Also, made other minor edits to the metadata.


Process contact
Individual's name Sophie King
Organization's name California Department of Fish and Wildlife
Contact's position BIOS Data Librarian
Contact's role processor


Contact information


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Geoprocessing history

Process
Process name
Date 2010-09-0914:25:19
Tool location C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project
Command issued
Include in lineage when exporting metadata No


Process
Process name
Date 2023-11-0111:17:25
Tool location c:\program files\arcgis\pro\Resources\ArcToolbox\toolboxes\Conversion Tools.tbx\ExportFeatures
Command issued
Include in lineage when exporting metadata No


Process
Date 2023-11-1313:12:06
Tool location c:\program files\arcgis\pro\Resources\ArcToolbox\toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
Include in lineage when exporting metadata No


Process
Date 2023-11-1313:12:25
Tool location c:\program files\arcgis\pro\Resources\ArcToolbox\toolboxes\Data Management Tools.tbx\Project
Command issued
Include in lineage when exporting metadata No


Process
Date 2023-11-1313:12:50
Tool location c:\program files\arcgis\pro\Resources\ArcToolbox\toolboxes\Data Management Tools.tbx\Rename
Command issued
Include in lineage when exporting metadata No


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Distribution

Distribution format
* Name File Geodatabase Feature Class


Transfer options
* Transfer size 0.007


Online source
Location https://wildlife.ca.gov/Data/BIOS
Function performed information

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Fields

Details for object ds696
* Type Feature Class
* Row count 0
Definition
Swainson's Hawk Nests - CDFW Region 2 [ds696]


Field OBJECTID
* Alias OBJECTID
* Data type OID
* Width 4
* Precision 0
* Scale 0
* Field description
Internal feature number.
* Description source
Esri
* Description of values
Sequential unique whole numbers that are automatically generated.


HideFieldOBJECTID


Field Shape
* Alias Shape
* Data type Geometry
* Width 0
* Precision 0
* Scale 0
* Field description
Feature geometry.
* Description source
ESRI
* Description of values
Coordinates defining the features.


HideFieldShape


Field Obs_Date
* Alias Obs_Date
* Data type Date
* Width 8
* Precision 0
* Scale 0
Field description
Date of initial observation.
HideFieldObs_Date


Field Survy_Year
* Alias Survy_Year
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Year of the survey.
HideFieldSurvy_Year


Field Nest_ID
* Alias Nest_ID
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Unique Nest ID, continuing from 2002 data set.
HideFieldNest_ID


Field Young_Pres
* Alias Young_Pres
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Presence of young confirmed.
List of values
Value -1
Description Yes


Value 0
Description No


HideFieldYoung_Pres


Field Soaring
* Alias Soaring
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Swainson's hawk behavior observation.
List of values
Value -1
Description Yes


Value 0
Description No


HideFieldSoaring


Field Perching
* Alias Perching
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Swainson's hawk behavior observation.
List of values
Value -1
Description Yes


Value 0
Description No


HideFieldPerching


Field Nest_Build
* Alias Nest_Build
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Swainson's hawk behavior observation.
List of values
Value -1
Description Yes


Value 0
Description No


HideFieldNest_Build


Field Mating
* Alias Mating
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Swainson's hawk behavior observation.
List of values
Value -1
Description Yes


Value 0
Description No


HideFieldMating


Field Incubating
* Alias Incubating
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Swainson's hawk behavior observation.
List of values
Value -1
Description Yes


Value 0
Description No


HideFieldIncubating


Field Foraging
* Alias Foraging
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Swainson's hawk behavior observation.
List of values
Value -1
Description Yes


Value 0
Description No


HideFieldForaging


Field Defensive
* Alias Defensive
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Swainson's hawk behavior observation.
List of values
Value -1
Description Yes


Value 0
Description No


HideFieldDefensive


Field Descript
* Alias Descript
* Data type String
* Width 254
* Precision 0
* Scale 0
Field description
General location description.
HideFieldDescript


Field Tree_Spp
* Alias Tree_Spp
* Data type String
* Width 10
* Precision 0
* Scale 0
Field description
Tree code for common name of nest tree species.
List of values
Value BO
Description Blue Oak


Value CW
Description Cottonwood


Value EU
Description Eucalyptus


Value PI
Description Pine


Value VO
Description Valley Oak


Value WI
Description Willow


Value OE
Description Other Exotic


Value ON
Description Other Native


HideFieldTree_Spp


Field Tree_Ht
* Alias Tree_Ht
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Nest tree height in feet.
HideFieldTree_Ht


Field LandU_NE
* Alias LandU_NE
* Data type String
* Width 10
* Precision 0
* Scale 0
Field description
Land use code describing north-east of nest.
List of values
Value AL
Description Alfalfa


Value CO
Description Commercial/Highway


Value CR
Description Cropland (wheat, corn etc)


Value FA
Description Fallow/Ruderal


Value GS
Description Grassland


Value GZ
Description Grazing/Pasture


Value OR
Description Orchard/Vineyard


Value RE
Description Residential/Urban


Value RI
Description Riparian


Value SW
Description Seasonal Wetland


HideFieldLandU_NE


Field LandU_SE
* Alias LandU_SE
* Data type String
* Width 10
* Precision 0
* Scale 0
Field description
Land use code describing south-east of nest.
List of values
Value AL
Description Alfalfa


Value CO
Description Commercial/Highway


Value CR
Description Cropland (wheat, corn etc)


Value FA
Description Fallow/Ruderal


Value GS
Description Grassland


Value GZ
Description Grazing/Pasture


Value OR
Description Orchard/Vineyard


Value RE
Description Residential/Urban


Value RI
Description Riparian


Value SW
Description Seasonal Wetland


HideFieldLandU_SE


Field LandU_SW
* Alias LandU_SW
* Data type String
* Width 10
* Precision 0
* Scale 0
Field description
Land use code describing south-west of nest.
List of values
Value AL
Description Alfalfa


Value CO
Description Commercial/Highway


Value CR
Description Cropland (wheat, corn etc)


Value FA
Description Fallow/Ruderal


Value GS
Description Grassland


Value GZ
Description Grazing/Pasture


Value OR
Description Orchard/Vineyard


Value RE
Description Residential/Urban


Value RI
Description Riparian


Value SW
Description Seasonal Wetland


HideFieldLandU_SW


Field LandU_NW
* Alias LandU_NW
* Data type String
* Width 10
* Precision 0
* Scale 0
Field description
Land use code describing north-west of nest.
List of values
Value AL
Description Alfalfa


Value CO
Description Commercial/Highway


Value CR
Description Cropland (wheat, corn etc)


Value FA
Description Fallow/Ruderal


Value GS
Description Grassland


Value GZ
Description Grazing/Pasture


Value OR
Description Orchard/Vineyard


Value RE
Description Residential/Urban


Value RI
Description Riparian


Value SW
Description Seasonal Wetland


HideFieldLandU_NW


Field Block_ID
* Alias Block_ID
* Data type Double
* Width 8
* Precision 0
* Scale 0


HideFieldBlock_ID


Field Block_Asgn
* Alias Block_Asgn
* Data type String
* Width 1
* Precision 0
* Scale 0
Field description
Whether the 5km sampling grid block was assigned to the surveyor who found this nest.
List of values
Value Y
Description Yes


Value N
Description No


HideFieldBlock_Asgn


Field Verified
* Alias Verified
* Data type SmallInteger
* Width 2
* Precision 0
* Scale 0
Field description
Was the final mapped site verified by the surveyor?
List of values
Value -1
Description Yes


Value 0
Description No


HideFieldVerified


Field Entry_Date
* Alias Entry_Date
* Data type Date
* Width 8
* Precision 0
* Scale 0
Field description
Data entry date.
HideFieldEntry_Date


Field Entered_By
* Alias Entered_By
* Data type String
* Width 20
* Precision 0
* Scale 0
Field description
Data entered by.
HideFieldEntered_By


Field Survyr_ID
* Alias Survyr_ID
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Surveyor ID.
HideFieldSurvyr_ID


Field Lat_WGS84
* Alias Lat_WGS84
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Latitude of nest site in WGS84 datum.
HideFieldLat_WGS84


Field Lon_WGS84
* Alias Lon_WGS84
* Data type Double
* Width 8
* Precision 0
* Scale 0
Field description
Longitude of nest site n WGS84 datum.
HideFieldLon_WGS84


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Metadata Details

Metadata language English(UNITED STATES)
Metadata character set utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata dataset
Scope name * dataset


* Last update 2023-11-13


ArcGIS metadata properties
Metadata format ArcGIS1.0
Standard or profile used to edit metadata FGDC


Created in ArcGIS for the item 2023-11-1313:12:18
Last modified in ArcGIS for the item 2023-11-1313:12:04


Automatic updates
Have been performed Yes
Last update 2023-11-1313:12:04


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Metadata Contacts

Metadata contact
Individual's name David Wright
Organization's name California Department of Fish & Wildlife, North Central Region
Contact's position Research Analyst
Contact's role point of contact


Contact information
Phone
Voice (916) 358-2945

Address
e-mail address David.Wright@wildlife.ca.gov

HideContact information


HideMetadata Contacts