California Least Tern Monitoring Sites Generalized CDFW ds3146

California least tern colonies are monitored during nesting season along the California Coast and data is reported to California Department of Fish and Wildlife. The colonies in this dataset range from the Tijuana river mouth near the Mexico border to Sacramento. Locations and data include both present and historic sites. Locations are approximate and can have variation over time. These approximate locations were overlaid with a statewide hexagon layer (ds675) and then a buffer was created in order to mask exact nesting locations. Some additional sites without location information can be found in the related table. The related table includes nesting data by year from 1990 - 2023. It's anticipated to update this dataset to include earlier and newer records. Monitoring data includes estimated fledglings, estimated breeding pairs, total number of nests, and predator information when included in site reports. Annual reports 2017 and earlier can also be found by searching in California Department of Fish and Wildlife's document library (nrm.dfg.ca.gov/documents/docViewer.aspx).

A version of this data, summarized by region, has been made available in BIOS as California Least Tern Monitoring Sites by Region [ds3147]. This is a publicly available dataset.

Data and Resources

Field Value
accessLevel public
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
datagov_dedupe_retained 20250724164837
identifier 734f8172-d39c-4b19-b22c-87feec8949fa
issued 2025-02-24T20:10:03.000Z
license http://www.opendefinition.org/licenses/cc-by
modified 2025-02-24T20:10:10.750Z
publisher California Department of Fish and Wildlife
resource-type Dataset
source_datajson_identifier true
source_hash 461f0d08d5a3616c174d8f13bc91fe2f729311ba060b704192eba0d88815ea9a
source_schema_version 1.1
theme {"Natural Resources"}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • authcdfw
  • beach
  • biota
  • bird
  • breeding
  • california-department-of-fish-and-wildlife
  • california-least-tern
  • california-natural-resources-agency
  • caopendata
  • cdfw
  • chronology
  • coast
  • colony
  • ds314620250213wm
  • environment
  • estuary
  • least-tern
  • nesting
  • productivity
  • reproduction
  • sternula-antillarum-browni
  • tern
isopen False
license_id other-license-specified
license_title other-license-specified
maintainer BIOS_Admin
maintainer_email geodata@wildlife.ca.gov
metadata_created 2025-09-24T06:27:07.344627
metadata_modified 2025-09-24T06:27:07.344635
notes <div style='text-align:Left;'><div><div><p><span>California least tern colonies are monitored during nesting season along the California Coast and data is reported to California Department of Fish and Wildlife. The colonies in this dataset range from the Tijuana river mouth near the Mexico border to Sacramento. Locations and data include both present and historic sites. Locations are approximate and can have variation over time. These approximate locations were overlaid with a statewide hexagon layer (ds675) and then a buffer was created in order to mask exact nesting locations. Some additional sites without location information can be found in the related table. The related table includes nesting data by year from 1990 - 2023. It's anticipated to update this dataset to include earlier and newer records. Monitoring data includes estimated fledglings, estimated breeding pairs, total number of nests, and predator information when included in site reports. Annual reports 2017 and earlier can also be found by searching in California Department of Fish and Wildlife's document library (</span><a href='http://nrm.dfg.ca.gov:80/documents/docViewer.aspx' style='text-decoration:underline;' rel='nofollow ugc'><span>nrm.dfg.ca.gov/documents/docViewer.aspx</span></a><span>). </span></p><p><span>A version of this data, summarized by region, has been made available in BIOS as </span><a href='https://apps.wildlife.ca.gov:443/bios6/?al=3147' style='text-decoration:underline;' rel='nofollow ugc'><span>California Least Tern Monitoring Sites by Region [ds3147]</span></a><span>. This is a publicly available dataset. </span></p></div></div></div>
num_resources 6
num_tags 30
title California Least Tern Monitoring Sites Generalized CDFW ds3146