Tree Swallow Habitat Range Map for California

A vector dataset representing the maximum current geographic extent of the Tree Swallow (Tachycineta bicolor) within California. It is part of the California Wildlife Habitat Relationships (CWHR) system, developed by the State of California to support habitat conservation, land use planning, and wildlife research. The range maps were originally delineated at a 1:5,000,000 scale and have been revised at 1:1,000,000.

Use Cases

• Model wildlife habitat relationships for the Tree Swallow species using the CWHR system's predictive framework.
• Support land use planning and impact assessment by analyzing the species' geographic distribution within California.
• Conduct species-level research on Tachycineta bicolor by integrating this range map with other CWHR life history and habitat data.

Strengths

• Data is part of the authoritative California Wildlife Habitat Relationships (CWHR) system, a state-developed information system.
• Range maps have been revised from an original scale of 1:5,000,000 to a more detailed 1:1,000,000 scale.
• Managed and updated by the State of California, specifically the California Department of Fish and Wildlife and California Natural Resources Agency.

Limitations

• The dataset is specific to a single bird species (Tree Swallow) and the geographic boundary of California, limiting broader ecological studies.
• The 'maximum current geographic extent' representation may not reflect fine-grained habitat suitability or population density within the range.
• As a component of a larger system, full analysis may require joining with other CWHR datasets for species codes, life history, or habitat relationships.

Provenance

Source

State of California, California Department of Fish and Wildlife, California Natural Resources Agency.

Collection Method

Vector range maps were originally delineated and have been gradually revised by species-level experts.

Freshness

The metadata was last updated on 2026-03-23.

Geography

California, USA.