Archives

Western burrowing owl

Athene cunicularia hypugaea Habitat: Grasslands, open; elevation up to 5,300 feet Survey Window: Feb 15–Jul 15 • Four crepuscular (dawn and dusk) surveys, 500-foot buffer as legally able, 7- to 10-meter transects • Feb 15–Apr 15: One survey • Apr 16–Jul 15: Three surveys with 3-week interval between surveys •..Read More

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Swainson’s hawk

Buteo swainsoni Habitat: Woodlands, grasslands Survey Window: Jan 1–Aug 31 • Jan 1–Apr 15: Survey for potential nest sites • Apr 20–Jun 9: Do not survey unless nest monitoring, then 2–3 surveys April 20 to mid-May and 2–3 surveys mid-May to June 9 • Jul–Aug 31: 2–3 surveys

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Southwestern willow flycatcher

Empidonax traillii extimus Habitat: Riparian; elevation below 8,500 feet Survey Window: May 1–Jul 31 • May: 1 diurnal survey; June: 2 diurnal surveys; July: 2 diurnal surveys • Five-day minimum interval between any survey • When surveying for both southwestern willow flycatcher and least Bell’s vireo, separate surveys must occur..Read More

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Ridgway’s rail

Rallus obsoletus levipes Habitat: Salt marsh, coastal emergent wetlands Survey Window: Feb 15–Apr 30 • Six diurnal surveys, at least one at dusk and one at dawn • Minimum 7-day interval between surveys

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Least Bell’s vireo

Vireo bellii pusillus Habitat: Riparian; elevation below 4,000 feet Survey Window: Apr 10–Jul 31 • Eight diurnal surveys • Ten-day interval between surveys

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Coastal California gnatcatcher

Polioptila californica californica Habitat: Scrub; elevation up to 2,000 feet Breeding Survey Window: Mar 15-Jun 30 Non-Breeding Survey Window: Jul 1-March 14 • Within Natural Community Conservation Plan (NCCP) area: Three diurnal surveys with seven-day interval between surveys, year round • Outside NCCP area: Mar 15–Jun 30: Six diurnal surveys..Read More

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Brown-headed cowbird

Molothrus ater Habitat: Woodlands, grasslands Survey Window: Feb 15–Aug 30 • Trap throughout breeding season or as required by permit • Generally, maintain up to three males and two wing-clipped females in trap • Check traps daily to release non-target captures

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Belding’s savannah sparrow

Passerculus sandwichensis beldingi Habitat: Salt marsh Survey Window: Feb 15–Apr 30 • Five diurnal surveys • General season, weather conditions may alter survey season

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