* {{cite book|last = Coward|first = Thomas Alfred|coauthors=|title = The Birds of the British Isles and Their Eggs (two volumes)|year = 1930|publisher = Frederick Warne|isbn = }} Third edition, volume 1.
* {{cite book|last = Fry|first = C. Hilary|coauthors= Fry, Kathie; Harris, Alan|title = Kingfishers, Bee-eaters and Rollers|year =1999|location = London|publisher = Christopher Helm|isbn =978-0-7136-5206-2}}
* {{cite book|last=Linnaeus|first=C|authorlink=Carolus Linnaeus|title=Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata|publisher=Holmiae. (Laurentii Salvii)|year=1758}} {{la icon}}
* {{cite book|last=Sinclair|first=Sandra|title = How Animals See: Other Visions of Our World|year= 1985|publisher=Croom Helm|location=Beckenham, Kent|isbn=978-0-7099-3336-6|pages= }}
* {{cite book|last = Snow|first = David|coauthors= Perrins, Christopher M (editors)|title = [[The Birds of the Western Palearctic]] (BWP) concise edition (2 volumes)|publisher = Oxford University Press|year = 1998|location =Oxford|isbn = 978-0-19-854099-1 }}
