Bureau of Land Management
BLM OR Northern Spotted Owl Site Summary Publication 2013 Point
NSO_SITESUM_PUBLIC_POINT: Data describing Northern Spotted Owl (NSO) nest sites, pair status, reproductive data, visits, etc. See Supplemental Information for greater detail and a list of Owl Species abreviations used in this data.
BLM Spotted Owl data used for public release.
The spotted owl Site data are coordinates that have been determined to be unique locations through evidence of continued use by owls. A Site is designated for any location of breeding spotted owls, the presence of young before dispersal, the repeated location of a pair during a single season or over several years, or some other strong indication of continued occupation. The repeated detection of a single owl during the same season or over several years usually does not warrant a Site designation. If the owl's center of activity/nest grove has moved sufficiently to change critical Site file information, a new Alternate is designated. An Alternate Site Center will normally result from the location of a new nest tree or newly fledged juveniles at a new location for a previously known pair. Some examples of a sufficient change are; location in a different 1/16 Section, location greater than ¼ mile from a previous Alternate, landowner change, different administrative designation, change in land classification such as critical habitat, etc. One exception to this is when barred owls occupy historic Sites or Alternates. The presence of barred owls may result in abandonment of a site center, documenting the new spotted owl use area is important in these instances. A new Alternate that is not based on a nest grove should have at least 2 years of known activity at that location without use of another Alternate. Each Site location is assigned a unique four digit master site number (MSNO), the MSNO followed by a letter designating the Alternate (O, A, B, etc) is the assigned five digit Identification number (IDNO). A single, or multiple IDNO’s may exist for each Site. The spotted owl summary portion of the data includes a single record for each year at every owl site with survey effort (and some with no survey effort), and is compiled from all survey visits during the given year. The summary data is attached to the coordinate for a unique IDNO at each site. Each summary record includes information such as survey effort, occupancy, nesting status, and reproductive status. When using the information from the summary data, be aware of the definitions so the data is correctly interpreted. STOC Northern Spotted Owl, only spotted owls are surveyed for or detected. STVA Barred Owl, only barred owls are detected. STNE Great Gray Owl, only great gray owls are detected. SBOH Spotted Owl Barred Owl hybrid, any generation, (no pure bred spotted owls present). This code will also be used on the rare instances when a hybrid/STVA mixed pair are encountered. STMX - Mixed pair (one pure bred spotted owl present). Provide a description of the species composition in the Comment field, e.g. Male spotted owl with a female barred owl. Be conservative when making this determination since this implies that the individuals are actually a social pair. A male and female should be detected in close proximity several times during the year. STUN Genus Strix, unknown species. BUVI Great Horned Owl detected.
Northern Spotted Owl
ISO 19115 Topic Categories
PUBLIC DATA: None, these data are considered public domain.
These data are provided by Bureau of Land Management (BLM) “as is” and might contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User’s intended use. The information contained in these data is dynamic and may change over time. The data are not better than the sources from which they were derived, and both scale and accuracy may vary across the data set. These data might not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office from which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes
Bureau of Land Management
P.O. Box 2965
ArcGIS, Citrix, Windows 2007
Bureau of Land Management
The NSO network database Site and Summary tables were queried. Two files were created, one consisting of only Site information, and one consisting of all Summary information with Site file coordinates attached to it. Within each of these files the data has been broken into 2 categories, the “internal” category includes all data points, the “external” does not include data points on private land.
Bureau of Land Management
GIS Data Administrator
P.O. Box 2965
D North American 1983
Internal feature number.
Sequential unique whole numbers that are automatically generated.
BLM Resource Area
Common name of location
A concatenation of the MSNO and Location Identifier (Alternate) in the Site table. When there are multiple Alternates, this narrows down the specific location within the MSNO site where the summary data has been collected.
A unique 4 digit Master Site Number assigned to each designated site under a statewide numbering system coordinated by the Oregon Department of Fish and Wildlife (ODFW), Northwest Region Office.
A 4 character field representing the year the summary data is collected.
The number of day visits to the site during the year, these do not include the opportunistic or incomplete “Additional” visits.
The number of night visits to the site during the year, these do not include the opportunistic or incomplete “Additional” visits. Night visits include visits spanning day and night if the majority of the survey occurred during the night.
The maximum number of males present at the site during the year. All for species STOC, for the particular IDNO.
The maximum number of females present at the site during the year. All for species STOC, for the particular IDNO
The maximum number of non-juveniles at the site during the year where the sex is not determined. Use this field only if the number of unknown sex birds exceeds the number of known sex birds. For example, if 2 unknown sex birds are detected on one visit, and a male is detected on another visit, the number of unknown sex equals 1 and the number of males equal 1. If all of the Visits to the IDNO resulted in nothing but unknowns, the number of unknowns is counted. All for species STOC, for the particular IDNO.
The maximum number of fledglings detected audibly or visually at the site during the year. Fledglings are defined as young that have left the nest tree. All for species STOC, for the particular IDNO.
A single character code which lists the Pair Status for the IDNO for the summary year. For sites with an owl confirmed at another site, both sites will be summarized as occupied. Manually edit the summary file with comments regarding possible duplicate occupation, the need to combine nesting or reproduction, or justification for limited surveys at one of the sites. Since only STOC is summarized by the application, any visits with a species STMX (mixed species, one pure spotted owl) or STUN (unknown Strix) will need manual edits. Pair Status is determined as follows for species STOC:
A pair plus at least one additional adult/subadult at the site. If the following conditions exist and the number of males and/or number of females > 1: 1) Two visits separated by at least one week that have a Visit Pair Status of “P”2) If during the visit, a male was detected and mouse fate = “G” or “F” or “M” (Taken to the female) 3) If a banded owl male and a banded owl female are confirmed, and they also existed the previous year. 4) If the nesting status (tblVisit.VI_NS) equal “I”(Incubation or Brooding), “O”(Nestlings or Branchers), or “F”(Fledglings Observed).
A pair, this includes instances where only one adult/subadult is detected but young are present. If the following conditions exist and the number of males = 1 and the number of females = 1: 1) Two distinct visits separated by at least one week have a Pair Status (tblVisit.VI_PR) of “P” 2) If during the visit, a male was detected and a record exists for that male where tblMouseFate.MF_FM = “G” (Taken to mate who cached it) 3) If a banded owl male and a banded owl female are confirmed, and they also existed the previous year. 4) If the nesting status (tblVisit.VI_NS) equal “I”(Incubation or Brooding), “O”(Nestlings or Branchers), or “F”(Fledglings Observed).
A male and female are detected, but the pair relationship does not fit “P” or “A”. If the above criteria produce null results and at least one male and one female are detected on at least two separate visits separated by at least one week.
A single bird is detected at least 2 times during the year and at least 6 visits are completed. There is no detection of the opposite sex. If both A and P produce null results, but only one sex is detected in at least two visits separated by at least one week, and at least one visit has to be before August 1st, and there are 6 or more than visits recorded.
The same as S but 5 visits or less.
If all of the above produce null results, but there was at least one owl detected on one of the visits. Usually a single response by a bird.
Not occupied, high survey effort. If there were 6 or more visits, and of those visits, 4 or more were night visits, and there were no owls detected on any of the visits.
Not occupied, moderate survey effort. If the number of visits were 3 or more and no owls are detected, and at least 2 visits were night visits, and all of the above produced null results.
Unknown occupancy, low survey effort. If no owls are detected and all of the above produced null results and at least 3 visits.
Unknown occupancy, very low survey effort. If no owls are detected and 2 or less 3 visits.
A single character code which lists the Nesting Status for the IDNO for the summary year.
Nesting is confirmed on or before 31 May. This includes visits where Nesting Status was determined to be incubation, brooding, nestlings, or detection of fledglings and one of the following: 1) At least one nesting status visit occurred during the month of May. 2) There were two visits with the nesting status above on or before 30 April, and the visits are at least one week apart.
Not nesting is confirmed on or before 31 May. This includes visits where Nesting Status was determined to be Not Nesting and one of the following: 1) Only one visit needed. Nest Status Support determined to be Brood Patch Absent-captured female, and the visit occurred after 15 April and before ??1 June??. 2) Only one visit needed. The visit occurred after 15 May but before 1 June. 3) Two visits are needed with Nesting Status equal to Not Nesting. They were separated by at least one week, and the first visit occurred after 30 April but before 16 May. 4) Two visits occurred with Nesting Status equal to Not Nesting. They were separated by at least three weeks, and the first visit occurred during April.
Unknown nesting status. If all the above produce null results, then Nesting Status = U.
A single character code which indicates the location of the nest tree. The nest tree will still be considered located even if it is only located once on or before 30 April and the summary does not determine incubation for the season.
At least one visit had the Nest Tree Located.
No visits with a Nest Tree Located, but at least one Nest Location is approximately known (within a few trees).
No nest tree location known.
A single character code which indicates the reproductive success for species STOC for the summary year.
Fledglings are detected (fledglings are defined as young out of the nest tree). This includes a visit where Nesting Status was determined to be Fledgling, and the visit occurred before 1 September.
Nesting is confirmed, but no young are produced (failed nest). There are four possibilities 1) Summary Nesting Status equals Incubation and at least two visits where No Young Present were determined (on or after 1 June) separated by at least one week 2) Summary Nesting Status equals Incubation and at least two visits in the month of June with no response. 3) Summary Nesting Status equals Incubation and at least two visits where Not Nesting is determined (on or before 31 May) separated by at least one week 4) Summary Nesting Status equals Incubation and any combination of the above 3 criteria for at least two visits separated by at least one week
Unknown nesting status, but protocol methods were used to determine that no young were produced. Summary Nesting Status equals Unknown and at least two visits separated by at least one week where No Young Present were determined (on or after 1 June).
Unknown. None of the above
A single character code indication of the final nesting and reproduction status for species STOC for the summary year. This field summarizes the LATEST stage of nesting or reproduction at the site during the year.
Incubation confirmed, unable to determine reproductive status (not enough information to determine nest failure).
Brooding confirmed, unable to determine reproductive status (not enough information to determine nest failure).
Incubation or brooding confirmed, but no young are produced (failed nest).
Unknown nesting status, but protocol methods were used to determine that no young were produced.
Nesting, stage unknown. None of the above and at least one visit where Nesting Status equals Nesting – Stage Unknown.
Unknown. None of the above
Township number of site
Range number of site
Section number of site
Quarter Section location of site
Sixteenth Section location of site
A 6 digit code for the site center in UTM coordinates. A typical entry of UTMX would be 513623. The last digit indicates an accuracy to within 1 meter. If you do not feel that the location is accurate to 1 meter, fill the last place(s) with 0 (513620). All UTM entries are in North America Datum 27, Zone 10.
A 7 digit code for the site center in UTM coordinates. A typical entry of UTMY would be 513623. The last digit indicates an accuracy to within 1 meter. If you do not feel that the location is accurate to 1 meter, fill the last place(s) with 0 (513620). All UTM entries are in North America Datum 27, Zone 10.
The Level 1 landowner is a 2 digit code indicating the landowner or agency administering the land at the nest site, core area, or whatever point on the map is the site center(primary landowner). This is ownership at the actual point, and may be different from the Resource Area boundary designated in the field SI_GI above. If a second landowner exists within the immediate vicinity (e. g. 1/4 mile) of the owl, the Level 1 secondary landowner is entered as SI_L1S.
.A 3 digit code for the secondary level of land ownership, such as National Forest, BLM District, Private Company, Municipality, Reservation, etc. for the nest site, core area, or whatever point on the map is the site center. If a second landowner exists within the immediate vicinity (e. g. 1/4 mile) of the owl, the secondary landowner is entered as SI_L2S.
BLM District Name.
2 character alphabetical code for demographic area
South cascades study area
Not within a demography area
Klamath study area
North coast study area
Other demography study area - describe in comments.
Roseburg study area (Tyee)
Coordinates defining the features.
Bureau of Land Management
GIS Data Management Specialist
P.O Box 2965
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Data are only available through the Oregon/Washington State office of the Bureau of Land Management.
Bureau of Land Management, Oregon State Office
P.O. Box 2965
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