Family Monarch-flycatchers (Monarchidae)


Kauai Elepaio (Chasiempis sclateri)


French: Monarque de Kauai German: Kauaimonarch Spanish: Elepaio de Kauai

Chasiempis sclateri


, 1882,



Recently shown to be vocally and genetically distinctive#R#R in addition to exhibiting strong morphological differences from C. sandwichensis (with C. ibidis), with which it has commonly been lumped. Monotypic.


Kauai, in W Hawaiian Is.

Descriptive notes

14–16 cm; 11–18 g, male on average c. 10% larger than female. Distinctive, with long graduated tail often held cocked at an angle, conspicuous white rump and wingbars. Crown... read more


Male’s primary song a squeaky, whistled “el-pai-o” of two or three more or less... read more


Widely distributed in variety of forest habitats above c. 900 m elevation. Abundance highest in... read more

Food and feeding

All elepaios feed primarily on arthropods, particularly insects and spiders (native and introduced species), which are taken on various... read more


Timing of nesting variable; nestbuilding observed in Mar and Apr, and earliest clutch in late Mar. Socially monogamous, remains paired year... read more


Sedentary. Adults presumably remain on same territory until death. No information on natal... read more

Status and conservation

VULNERABLE. Restricted-range species: present in Central Hawaiian Islands EBA. Still fairly common. Total population estimated at 40,000 birds in 1970s, apparently reduced (... read more

Recommended citation

del Hoyo, J., Collar, N. & Marks, J.S. (2020). Kauai Elepaio (Chasiempis sclateri). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 16 February 2020).