Schemes including Sayornis nigricans

• eBird/Clements Checklist 6.8 Sayornis nigricans
• IUCN Red List of Threatened Species. Version 2012.1 Sayornis nigricans
• eBird/Clements Checklist 6.7 Sayornis nigricans
• IUCN Red List of Threatened Species. Version 2012.2 (106004293) Sayornis nigricans
• CONABIO (189897AVESB501112) Sayornis nigricans
• NatureServe Explorer: An online encyclopedia of life. Version 7.1 (ELEMENT_GLOBAL.2.103376) Sayornis nigricans
• eBird/Clements Checklist 6.9 Sayornis nigricans
• GBIF (2483612) Sayornis nigricans
• eBird/Clements Checklist v2017 Sayornis nigricans