Taxon - Links and literature
Bird Life 3 [62184893]
Bird Life [http://www.birdlife.org] [as Aegolius gradyi Olson, 2012]
Data retrieved on: 23 November 2018
Gill F., Donsker D. & Rasmussen P. (eds): IOC World Bird List 11.1 [http://www.worldbirdnames.org/] [as Aegolius gradyi Olson, 2012]Data retrieved on: 5 December 2021
IUCN Red List of Threatened Species 2024-1 [62184893]
IUCN Red List of Threatened Species [http://www.iucnredlist.org/] [as Aegolius gradyi Olson, 2012]
Data retrieved on: 29 January 2024
Paleobiology Database [289805]
Paleobiology Database [https://paleobiodb.org/] [as Aegolius gradyi Olson, 2012]
Data retrieved on: 11 December 2015
Čížek V. et al. (2021-23): České názvosloví ptáků světa 05c, NK ČSO [as Aegolius gradyi Olson, 2012]Data retrieved on: 28 March 2024