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Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Subsectio: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauria
Ordo: Saurischia
Cladus: Theropoda
Cladus: Neotheropoda
Infraclassis: Aves
Ordo: Passeriformes
Subordo: Passeri
Parvordo: Corvida
Superfamilia: Corvoidea

Familia: Monarchidae
Genus: Chasiempis
Species: C. ibidis – C. sandwichensis – C. sclateri

Chasiempis Cabanis, 1847

Archiv für Naturgeschichte. Berlin. 13 p. 207
Vernacular names
English: ‘Elepaio
Nederlands: Elepaio
русский: Элепайо
svenska: Elepaio

The ʻelepaios are three species of monarch flycatcher in the genus Chasiempis. They are endemic to the Hawaiian Islands, and were formerly considered conspecific. They measure 14 cm long and weigh 12–18 g. One species inhabits the Big Island, another Oʻahu and the third Kauaʻi. Being one of the most adaptable native birds of Hawaiʻi, no subspecies have yet become extinct, though two have become quite rare.

The ʻelepaio is the first native bird to sing in the morning and the last to stop singing at night; apart from whistled and chattering contact and alarm calls, it is probably best known for its song, from which derives the common name: a pleasant and rather loud warble which sounds like e-le-PAI-o or ele-PAI-o. It nests between January and June.

Taxonomy and systematics

The genus Chasiempis contains three species:[1]

Image Scientific name Common Name Distribution
Chasiempis sclateri (Kauai 'Elepaio) (7809328260) (cropped).jpg Chasiempis sclateri Kauaʻi ʻelepaio Hawaiian Island of Kauaʻi
Oahu Elepaio (9-19-2017) Aiea Loop trail, Keaiwa Heiau recreation area, Honolulu co, Hawaii -02 (23717988448).jpg Chasiempis ibidis Oʻahu ʻelepaio Hawaiian Island of Oʻahu.
Hawai'i Elepaio (9-4-2017) Pu'u O'o trail, Kipuka Ainahou section, Hawai'i co, Hawaii -01 (37398887872).jpg Chasiempis sandwichensis Hawaiʻi ʻelepaio Hawaiian Island of Hawaiʻi.

The sequential colonization and speciation of the Chasiempis sandwichensis subspecies (denoted by the orange arrows) with their divergence times and island geological ages.[2]

Uniquely among Hawaiian passerines, the distribution of the ʻelepaio is peculiarly discontinuous. According to fossil remains, the birds did not occur on Maui Nui or its successor islands. Their current distribution is absent from the Maui Nui island group. If this assumption is correct, the reasons are unknown at present. However, the strange "flycatcher finches", extinct honeycreepers of the genus Vangulifer, are only known to have inhabited Maui and probably evolved on Maui Nui.[3] There, they probably filled the same ecological niche as the ʻelepaio did on the other islands. Competition from Vangulifer may thus have prevented a successful colonization of Maui Nui by Chasiempis.
Cultural significance

In Hawaiian tradition, the ʻelepaio was among the most celebrated of the birds.[4][5] It is associated with a number of significant roles in culture and mythology. Chiefly, it helped kālai waʻa (canoe-builders) to select the right koa tree to use for their waʻa (canoe). The ʻelepaio is a bold and curious little bird, and thus it was attracted to humans whom it found working in its habitat, and it quickly learned to exploit feeding opportunities created by human activity, altering its behavior accordingly[6] – which incidentally made it even more conspicuous.

For example, it followed canoe builders through dense vegetation, watching them as they searched for suitable trees. They considered it their guardian spirit, an incarnation of their patron goddess Lea, because if the bird pecked at a fallen tree, it was a sign that the tree was riddled with burrowing insects and thus not good anymore, but when the bird showed no interest in a tree, it indicated that the wood was suitable. This is the origin of the ancient Hawaiian proverb, ʻUā ʻelepaio ʻia ka waʻa ("The canoe is marked out by the ʻelepaio"). Due to its insectivorous habit, farmers believed the ʻelepaio to be the incarnation of Lea's sister goddess, Hina-puku-ʻai, who protected food plants and was a patron of agriculture.

Although deforestation for agriculture destroyed large areas of habitat, the ʻelepaio managed to adapt well to the initial settlement. Thus, its population was large enough to withstand the additional pressures that came about with Western colonization of the islands. However, the Oʻahu species has declined precipitously in recent years and is now endangered.

"Monarchs « IOC World Bird List". www.worldbirdnames.org. Retrieved 2017-01-01.
Eric A. VanderWerf; Lindsay C. Young; Norine W. Yeung; David B. Carlon (2010). "Stepping stone speciation in Hawaii's flycatchers: molecular divergence supports new island endemics within the elepaio". Conservation Genetics. 11: 1283–1298. doi:10.1007/s10592-009-9958-1.
James, Helen F.; Olson, Storrs L. (1991). "Descriptions of Thirty-Two New Species of Birds from the Hawaiian Islands: Part II. Passeriformes" (PDF). Ornithological Monographs. 46: 1–88. doi:10.2307/40166713.
Kanahele, George S. (1996): Waikiki 100 B.C. to 1900 A.D. Honolulu: University of Hawaii Press, p. 29, ISBN 0824817907.
Soehren, Rick (1996): The Birdwatcher's Guide to Hawaiʻi. Honolulu: University of Hawaii Press, p. 1, ISBN 0824816838.

VanderWerf, Eric A. (1994). "Intraspecific variation in foraging behavior of Elepaio in Hawaiian forests of different structure" (PDF). Auk. 111 (4): 917–932. doi:10.2307/4088824.

Further reading

VanderWerf, Eric A. (2001). "Two-Year Delay in Plumage Maturation of Male and Female ʻElepaio". Condor. 103: 756. doi:10.1650/0010-5422(2001)103[0756:tydipm]2.0.co;2.
ʻElepaio on the Audubon watch list. Contains a photo of sclateri, which shows the distinctness of that taxon well.
ʻElepaios - BirdLife International

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