Department of Fish and Game
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California Wildlife Habitat Relationships System Reports

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The CWHR database software produces nine types of output reports which are described as follows:

  1. Species List.   This is a list of the names and management status ratings of all amphibians, birds, mammals, and reptiles known to occur in California.

  2. Life history Notes for a Single Species.   This is text notes, references and a range map for a selected species from "California's Wildlife, Volumes I-III."

  3. A List of All Information about One Species.   This output will produce the CWHR model for a single species, and more than one species model may be requested in a query.  The model includes information on taxonomy, legal status, life history, seasonality, locational occurrence, habitat suitability ratings, and element suitability ratings.  These reports are desired for evaluating species-specific CWHR predictions, or management actions that are designed to modify habitat to influence the given species.

  4. A List of Species for a Single Situation.   A list is produced with all wildlife species in the CWHR database predicted to occur in the single habitat situation defined by the user.  More than one habitat type and stage can be specified.  The situation is defined by specifying the habitat, seral stages, location, seasons, habitat elements, legal status, and life requisite levels.  Any combination or all of these parameters may be specified.  Typical applications of the Single Situation Reports are those where lists of species predicted to occur in project areas are desired.  Summary and detailed reports may be specified.  Summary reports just list predicted species without species-specific habitat relationships information, while detailed reports present the habitat information.

  5. A List of Species Comparing Two Situations.   This report compares species lists between contrasting habitat situations.  All queryparameters identified for Single Situation Reports can be entered for both situations.  The report is a side-by-side comparison of predicted species lists for both situations.  This type of Two Situation Comparison Report is useful when species lists are compared between two different habitat scenarios for impact assessment, biodiversity considerations, or habitat management planning.

  6. A List of Species Comparing Two Situations.   Habitat Value Comparison Report.  This report differs from the Species Comparison Reports because average habitat suitability ratings are compared between each species and taxa (amphibians, reptiles, birds, and mammals) between the two situations.  This type of Two Situation Comparison Report is useful when habitat values are compared between two different habitat scenarios for impact assessment, biodiversity considerations, or habitat management planning.

  7. A List of Species Comparing Two Situations.   Weighted Habitat Value Comparison Report.  This report is the same as the Habitat Value Comparison except that weights are multiplied to the suitability ratings to produce habitat units which are compared between the two situations.  The weights typically are acreages of the habitats.  This type of Two Situation Comparison Report is useful when habitat units that are the product of habitat suitability and area are compared between two different habitat scenarios for impact assessment, biodiversity considerations, or habitat management planning.

  8. Description of a Single Habitat.   This is text notes for a selected habitat from "A Guide to Wildlife Habitats of California".

  9. A List of Species Which Use a Given Element.   This lists all species which use a selected habitat element (e.g. acorns, large snags, vernal pools) to meet their requirements for breeding, feeding or cover and the degree to which each species finds that element essential.