Taxon - Links and literature
Bird Life 5.1 [31669]
Bird Life [http://www.birdlife.org] [as Lanius pallidirostris Cassin, 1852]
Data retrieved on: 26 April 2013
Gill F., Donsker D. & Rasmussen P. (eds): IOC World Bird List 11.1 [http://www.worldbirdnames.org/] [as Lanius excubitor pallidirostris Cassin, 1851]Data retrieved on: 22 April 2021
Clements, J. F.: eBird/Clements checklist of birds of the world 6.7, Cornell Lab of Ornithology [as Lanius meridionalis pallidirostris]Data retrieved on: 17 April 2013