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Alternative name: Oaxaca Hummingbird
- Eupherusa cyanophrys
- Green below
- Turquoise-blue crown
- White undertail
- Green crown
- White postocular spot
- Grey ear-coverts
- Grey underparts
Immature is similar to female
Endemic to southern Mexico (Sierra de Miahuatlán of Oaxaca).
Classified as Endangered in the 2008 IUCN Red List2.
- Clements, JF. 2009. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2009. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.
- BirdLife International
- BirdForum Opus contributors. (2023) Blue-capped Hummingbird. In: BirdForum, the forum for wild birds and birding. Retrieved 1 December 2023 from https://www.birdforum.net/opus/Blue-capped_Hummingbird
GSearch checked for 2020 platform.