Horned Lark (Streaked)
Streaked Horned Lark (Eremophila alpestris strigata)
Habitat: Prairie
Habitat Attribute: Large, open landscapes with low-saturated and sparse vegetation
Population Objectives (Ecoregions)
Puget Lowlands:
- By 2030, increase the current estimated population of 252 birds by ≥50.8% to ≥380 birds (4.2% annual exponential growth), with ≥280 birds in ≥8 subpopulations, and another ≥100 birds elsewhere throughout the ecoregion.
Willamette Valley (North):
- By 2030, increase the current estimated population of 195 birds by ≥26.7% (2.4% annual exponential growth) to ≥247 birds, with ≥90 birds in ≥3 subpopulations, and another ≥157 birds elsewhere throughout the ecoregion.
Willamette Valley (West):
- By 2030, increase the current estimated population of 449 birds by ≥61.3% (4.9% annual exponential growth) to ≥724 birds, with ≥600 birds in ≥9 subpopulations, and another ≥124 birds elsewhere throughout the ecoregion.
Willamette Valley (Southeast):
- By 2030, increase the current estimated population of 456 birds by ≥61.2% (4.9% annual exponential increase) to ≥735 birds, with ≥600 birds in ≥9 subpopulations, and another ≥135 birds elsewhere throughout the ecoregion.
Habitat Objectives (Ecoregions)
Puget Lowlands:
- By 2030, maintain ≥8 suitable habitat areas as described below that include ≤1,821 ha (4,500 ac).
Willamette Valley (North):
- By 2030, maintain ≥3 suitable habitat areas as described below that include ≤209 ha (516 ac).
Willamette Valley (West):
- By 2030, maintain ≥9 suitable habitat areas as described below that include ≤1,420 ha (3,509 ac).
Willamette Valley (Southeast):
- By 2030, maintain ≥9 suitable habitat areas as described below that include ≤1,420 ha (3,509 ac).
Population and Habitat Objectives (Subregions)
Size, Number, and Distribution of Subpopulations and Habitat Areas by 2030:
Puget Lowlands:
- ≥6 large subpopulations (i.e., >20 pairs) in <1,518 ha (3,750 ac)/subpopulation
- ≥2 medium subpopulations (i.e., 10-20 pairs) in <303 ha (750 ac)/subpopulation
Willamette Valley (North):
- ≥3 medium subpopulations (i.e., >15 pairs) in <209 ha (516 ac)/subpopulation
Willamette Valley (West):
- ≥3 large subpopulations (i.e., >50 pairs) in <626 ha (1,548 ac)/subpopulation
- ≥6 medium subpopulations (i.e., 25-50 pairs) in <794 ha (1,961 ac)/subpopulation
Willamette Valley (Southeast):
- ≥3 large subpopulations (i.e., >50 pairs) in <626 ha (1,548 ac)/subpopulation
- ≥6 medium subpopulations (i.e., 25-50 pairs) in <794 ha (1,961 ac)/subpopulation
All Ecoregions:
- all of the habitat areas should be in secure conservation status (i.e., ownership or easements) and managed in ways compatible with suitable habitat
- ≤10% of the subpopulation habitat areas should be hostile habitat (i.e., urban, residential, high density rural)
Population Objectives (Sites)
Target Densities in Suitable Habitat:
Puget Lowlands:
- South: >0.03 birds/ha (>0.01 birds/ac)
Willamette Valley:
- North: >0.03 birds/ha (>0.01 birds/ac)
- South: >0.10 birds/ha (>0.04 birds/ac)
Habitat Objectives (Sites)
Open landscapes >35 ha (100 ac) dominated by herbaceous vegetation with all or part of the landscape in the following conditions:
- bare ground >15% and patchily distributed
- shrub cover <2%
- canopy cover = 0%
- >90% of the vegetation <0.3 m (13 in) tall in midMay
- <1% of the landscape in tall herbaceous vegetation (i.e., >1.5 m [50 in] tall)
Cited Plan