Swainson s hawk and Black-chinned hummingbird were predicted in the Central Valley and other degraded habitats. The California kangaroo rat is the most widespread of the mammals in this group, but its range is limited to grassland in northern California. The range of the Western spadefoot is relatively large but its grassland habitat has been severely modified. Summary of species at different levels of biodiversity management. As a group, reptiles appear to be the best protected according to their management status.
Amphibians are the least well-represented group in managed areas.
As described in Chapter 3, CA-GAP predicted species distributions on the basis of range boundaries and the suitability of habitat types with the range. It does not guarantee that a species will occur at all locations that are modeled as suitable habitat. For some species, there are additional habitat elements that further control their distribution. Elements such as the presence of snags, proximity to surface water, or the adjacency of different critical habitat types, for example, are site-specific features that can not be detected at a regional scale with remotely sensed data. Habitat structure is also a crucial factor in determining habitat suitability for many species.