Loxops
TheMaui ʻakepa,Loxops ochraceus. Specimen shown is a male.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Fringillidae
Subfamily:	Carduelinae
Genus:	Loxops Cabanis, 1847
Type species
Fringilla coccinea[1] Gmelin, 1789
Species
see text

Loxops is aHawaiian honeycreepergenus in thefinchfamily, Fringillidae. Most of them are commonly known asʻakepa.

There are 5 species in this genus, two of which are recently extinct or possibly extinct:^[2]

GenusLoxops –Cabanis, 1847 – five species

Common name	Scientific name and subspecies	Range	Size and ecology	IUCN status and estimated population
ʻAkekeʻe or Kauai ʻakepa	Loxops caeruleirostris (Wilson, SB, 1890)	Kauaʻi	Size: Habitat: Diet:	CR
Hawaiʻi ʻakepa Male Female	Loxops coccineus (Gmelin, 1789)	Hawaiʻi	Size: Habitat: Diet:	EN
†Hawaiʻi creeper orʻalawī Male Female	Loxops mana (Wilson, SB, 1891)	Hawaiʻi.	Size: Habitat: Diet:	EN
†Maui ʻakepa	Loxops ochraceus Rothschild, 1893	Maui	Size: Habitat: Diet:	EX
Oʻahu ʻakepa	Loxops wolstenholmei (Rothschild,, 1893)	Oahu	Size: Habitat: Diet:	EX

Molecular analysis supports the genus diverging from its closest relatives, theChlorodrepanisʻamakihis, during the earliestPleistocene, about 2.47 million years ago. The clade containing both genera issister to the genusMagumma, which contains theʻanianiau, from which they diverged during the latestPliocene, about 2.78 million years ago. Genetic analysis of the extant species supportsL. mana as being the most basal extant member of the group, diverging from the other species slightly later in thePleistocene at about 1.9 million years ago, withL. coccineus andL. caeruleirostris diverging 600,000 years afterL. mana. The phylogenetic position of the extinct species is not known.^[3]

Loxops average the size of 11 cm. They are considered a finch-like bird that also have a notched tail. Their bills have a cone shape to them and they are pale blue with a dark tip. They are also hard to find in the field. Males typically are a darker shade of green on the top while their belly-side is yellow. They also have a black mask that covers their face up until behind its eye while its forehead, forecrown, and backside is also yellow. Females resemble the same colors as the males, but the colors are muted and less vibrant.^[4]

Theʻakepa (Loxops sp.) are a group of one of the smallest Hawaiian forest birds, at four inches long and weighing 10 grams. They are placed in the genusLoxops. Only one of the species in the genus, theHawaiʻi ʻakepa, is still extant, and is classified asEndangered by theIUCN. Previously considered conspecific, the group was split into distinct species in 2015. Found only in high elevation old growth rainforest, these nonmigratorypasserines have rounded heads, black eyes, and black wings and tail. Adult males sport one of the most brilliant orange colors found in any bird, a plumage which takes four years to develop. Females are greenish gray on back, lighter gray on front, with varying amounts of yellow and sometimes pale orange on the breast and belly. Juveniles appear similar to females, though are generally duller in color.

All ʻakepa have an unusual cross-bill. When closed, the upper bill tip slightly overlaps the lower bill tip to one side (this cannot be seen in the field). When opening the bill, as in prying open leaf buds to extract small caterpillars, the bills swing dramatically sideways, and this is easily seen in the hand. Some birds cross one way, and some the other, apparently randomly. The ʻakepa cross-bill operates similarly to that in the North American crossbills (genusLoxia), but is much less obvious when the bill is closed.

Hawaiʻi ʻakepa are usually found from 1,500 to 2,200 meters above sea level. They are non-territorial, and group male displays have often been observed in the beginning of the breeding season. They participate in mixed-species flocks during the non-breeding season. ʻAkepa is a Hawaiian term meaning "agile", befitting their active foraging at branch tips.

TheLoxops commonlybreed during the months of March and April and possibly during the months of February to June. The nests of theLoxops are found in theʻōhiʻa trees.^[4]

The group is highly dependent onʻōhiʻa lehua trees andkoa trees for food. The bills are specialized for opening ʻōhiʻa lehua leaf buds in search of small caterpillars. Fretz (2002) suggests that this food source is only found in old-growth Hawaiian forests and could be one factor in ʻakepa population declines. The lehua (or blossom) of the ʻōhiʻa tree provides a source of nectar that this bird consumes occasionally. The koa tree's cracked bark serves as a home for many insects and arthropods that the ʻakepa finds delectable.

• Loxops coccineus: The Hawaiʻi ʻakepa survives only in two or three locations, all on the island of Hawaii: one population inHakalau Forest National Wildlife Refuge (on the Hamakua Coast of Mauna Kea), one in the upper forest areas ofKau (in the southern part of the island), and one on the northern slope ofHualālai (perhaps extirpated).
• Loxops wolstenholmei: The Oahu ʻakepa was found in large numbers until the 1890s. Immediately afterward, a sharp drop in its numbers was noted. Many feel that it had disappeared by the 1920s; however, scattered, unconfirmed reports were posted in the 1990s. This subspecies' male was brick red in coloration, while the female was dark gray.
• Loxops ochraceus: The Maui ʻakepa was found on the mountain of Haleakalā in east Maui. This population was detected at low numbers until 1992, when the last sighting was documented. There are still reports of green yellow birds flying in the remote reserve, so there may be individuals remaining, but this is very unlikely as dedicated intensive surveys have failed to confirm any Maui ʻakepa.

Loxops species are considered endangered as their populations have been declining rapidly over the last ten years. Modern developments that take over the environment are threatening theLoxops and reducing their habitat availability in the Kokeʻe region. A lot of the current region of theLoxops is protected byAlakaʻi Wilderness Preserve and, to some extent, byKokeʻe State Park.^[4]

• Loxops
• Hawaiian honeycreepers
• Endemic fauna of Hawaii
• Bird genera
• Carduelinae
• Taxa named by Jean Cabanis

• Articles with short description
• Short description is different from Wikidata
• Articles with 'species' microformats
• Taxonomy articles created by Polbot