Geographic range:

• Passerculus sandwichensis sandwichensis: Amutka I., e Aleutians and w Alaskan Pen.; > to s California
• Passerculus sandwichensis anthinus: Aleutians and n Alaska to sw Canada; > to Baja, s Mexico
• Passerculus sandwichensis crassus: SE Alaska (Alexander Arch.) and adjacent mainland Alaska
• Passerculus sandwichensis brooksi: Vancouver I. and coastal sw Br. Col. to nw Calif.; > to Baja
• Passerculus sandwichensis alaudinus: Coastal n California (Humboldt to San Luis Obispo County)
• Passerculus sandwichensis brunnescens: Mexico (Durango to Jalisco, Puebla, Guerrero and Oaxaca)
• Passerculus sandwichensis rufofuscus: Central Arizona and n New Mexico to n Mexico (Chihuahua)
• Passerculus sandwichensis wetmorei: Mountains of extreme sw Guatemala
• Passerculus sandwichensis nevadensis: Great Basin and Great Plains of N America; > to s Mexico
• Passerculus sandwichensis savanna: Nova Scotia, Prince Edward I. and Magdalen I.; > to Bahamas
• Passerculus sandwichensis mediogriseus: SE Canada (Ontario to Gaspé Pen.) and ne US; > se US
• Passerculus sandwichensis labradorius: E Quebec, Labrador and Newfoundland; > to se Texas
• Passerculus sandwichensis oblitus: Central Canada and n-central US; > to ne Mexico
• Passerculus sandwichensis princeps: Sable I. (Nova Scotia); > coastal Massachusetts to Georgia
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