Schemes including Strix occidentalis

• eBird/Clements Checklist 6.8 Strix occidentalis
• IUCN Red List of Threatened Species. Version 2012.1 Strix occidentalis
• eBird/Clements Checklist 6.7 Strix occidentalis
• IUCN Red List of Threatened Species. Version 2012.2 (106002242) Strix occidentalis
• CONABIO (190086AVESB501112) Strix occidentalis
• Norma 059, 2010 Strix occidentalis
• NatureServe Explorer: An online encyclopedia of life. Version 7.1 (ELEMENT_GLOBAL.2.103254) Strix occidentalis
• eBird/Clements Checklist 6.9 Strix occidentalis
• GBIF (2497487) Strix occidentalis
• eBird/Clements Checklist v2017 Strix occidentalis