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biosds3146_fpu (FeatureServer)

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Service Description: This dataset tracks the distribution of California least tern colonies along the California Coast. Colonies are monitored annually during the nesting season and data is reported to California Department of Fish and Wildlife.

Service ItemId: 2913d84c33e3479a80204c9a15cb89f2

Has Versioned Data: false

Max Record Count: 2000

Supported query Formats: JSON

Supports applyEdits with GlobalIds: False

Supports Shared Templates: True

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Description:

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.



Copyright Text: Laura Van Vranken; Environmental Scientist; California Department of Fish and Wildlife (CDFW); R5-SCR; ; ; ; ; Laura.Vanvranken@wildlife.ca.gov;

Spatial Reference: 102100 (3857)

Initial Extent:
Full Extent:
Units: esriMeters

Child Resources:   Info   SharedTemplates

Supported Operations:   Query   ConvertFormat   Get Estimates