White-Breasted Nuthatch (Slender-Billed)
Slender-Billed White-Breasted Nuthatch (Sitta carolinesis aculeata)
Habitat: Oak Savannah, Woodland, or Forest
Habitat Attribute: Mature oak trees or snags with cavities
Population Objectives (Ecoregions)
Puget Lowlands:
- By 2030, increase the estimated population of <10 birds by 530% to 63 birds (20.2% annual exponential growth) with >32 birds in ≥2 subpopulations and another ≥32 birds elsewhere throughout the ecoregion.
Habitat Objectives (Ecoregions)
Puget Lowlands:
- By 2030, maintain ≥2 suitable habitat areas as described below that include ≤73 ha (180 ac) with ≥70% habitat suitability/patch.
Population and Habitat Objectives (Subregions)
Puget Lowlands:
Size, Number, and Distribution of Subpopulations and Habitat Areas by 2030:
- ≥1 large subpopulations (i.e., ≥25 pairs) in <73 ha (180 ac)/subpopulation
- ≥2 medium subpopulations (i.e., 15-25 pairs) in <49 ha (120 ac)/subpopulation
- ≥4 small populations (i.e., 5-15 pairs) in <24 ha (60 ac)/subpopulation
- all the habitat areas should have ≥90% of the area in secure conservation status (i.e., ownership or easements) and managed in ways compatible with suitable habitat
- ≤10% of the subpopulation habitat area should be hostile habitat (i.e., urban, residential, high density rural)
Population Objectives (Sites)
Target Densities in Suitable Habitat:
Puget Lowlands:
- the objective is to establish a population
Willamette Valley:
- North: >0.46 birds/ha (>0.19 birds/ac)
- South: >0.27 birds/ha (>0.11 birds/ac)
Klamath Mountains:
- Umpqua: >0.10 birds/ha (>0.04 birds/ac)
- Rogue: >0.24 birds/ha (>0.10 birds/ac)
Habitat Objectives (Sites)
Oak Savannah, Woodland, or Forest in the following
conditions:
- canopy cover 40-80%
- subcanopy cover <20%
- conifer cover in the canopy and subcanopy <10%
- mean DBH >53 cm (21 in)
- >20% of oak trees with >70 cm (28 in) DBH
Cited Plan
