California spotted owls
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Abstract
California spotted owls (Strix occidentalis occidentalis) are habitat specialists that are strongly associated with late-successional forests. For nesting and roosting, they require large trees and snags embedded in a stand with a complex forest structure (Blakesley et al. 2005, Gutiérrez et al. 1992, Verner et al. 1992b). In mixed-conifer forests of the Sierra Nevada, California spotted owls typically nest and roost in stands with high canopy closure (≥75 percent) [Note: when citing studies, we use terminology consistent with Jennings et al. (1999), however, not all studies properly distinguish between canopy cover and closure and often use the terms interchangeably (see chapter 14 for clarification)] and an abundance of large trees (>24 in (60 cm) diameter at breast height [d.b.h.]) (Bias and Gutiérrez 1992, Gutiérrez et al. 1992, LaHaye et al. 1997, Moen and Gutiérrez 1997, Verner et al. 1992a). The California spotted owl guidelines (Verner et al. 1992b) effectively summarized much of the information about nesting and roosting habitat. Since that report, research on the California spotted owl has continued with much of the new information concentrated in five areas: population trends, barred owl (Strix varia) invasion, climate effects, foraging habitat, and owl response to fire.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | Federal Government Series |
| Title | California spotted owls |
| Series title | General Technical Report |
| Series number | PSW-GTR-237 |
| Chapter | 5 |
| Year Published | 2012 |
| Language | English |
| Publisher | U.S. Forest Service |
| Publisher location | Albany, CA |
| Contributing office(s) | Western Ecological Research Center |
| Description | 11 p. |
| Larger Work Type | Report |
| Larger Work Subtype | Federal Government Series |
| Larger Work Title | Managing Sierra Nevada forests (General Technical Report PSW-GTR-237) |
| First page | 61 |
| Last page | 71 |
| Country | United States |
| State | California |
| Other Geospatial | Sierra Nevada |
| Google Analytic Metrics | Metrics page |