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| Hawaiian crow (ʻAlalā) | |
|---|---|
| Name | Hawaiian crow (ʻAlalā) |
| Status | Critically endangered (extinct in the wild) |
| Status system | IUCN3.1 |
| Genus | Corvus |
| Species | hawaiiensis |
| Authority | Rothschild, 1893 |
Hawaiian crow (ʻAlalā) The Hawaiian crow is a critically endangered corvid once endemic to the island of Hawaiʻi, notable for its intelligence, vocal repertoire, and cultural importance to Native Hawaiian communities. Rediscovered in dwindling numbers during the 20th century, it became the focus of intensive conservation, captive breeding, and reintroduction programs involving multiple agencies and institutions.
Described by Walter Rothschild in 1893, the species was placed in the genus Corvus alongside other corvids such as the American crow, Carrion crow, and hooded crow groups; subsequent molecular studies compared its lineage to Corvus corax, Corvus brachyrhynchos, and island taxa like the Chatham raven. Taxonomic work involved researchers affiliated with institutions including the British Museum (Natural History), the University of Hawaiʻi at Mānoa, and the Smithsonian Institution. The Hawaiian name ʻalalā derives from Native Hawaiian language and oral histories recorded by ethnographers and scholars such as Samuel Kamakau, David Malo, and Abraham Fornander.
Adults measured approximately 46–48 cm in length with glossy black plumage similar to Common raven but more slender, and exhibited a slightly curved bill reminiscent of New Caledonian crow. Sexes are similar in plumage, as with many corvids like the Jackdaw and Rook. The species displayed complex vocalizations comparable to signals described in studies from Cornell Lab of Ornithology researchers, with calls noted in field records kept by ornithologists from the U.S. Fish and Wildlife Service and the National Audubon Society.
Historically restricted to the island of Hawaiʻi (island), the species occupied montane dry forests, subalpine shrublands, and ʻōhiʻa lehua-dominated woodlands associated with Metrosideros polymorpha. Records of occurrence come from 19th-century collectors, early surveys by Leonard Stejneger, and later habitat assessments by biologists at the Hawaiʻi Division of Forestry and Wildlife and federal partners such as the US Geological Survey. Significant historical locales include the Keauhou, Hawaii Volcanoes National Park, and upland tracts near Hāmākua and Kohala.
As a corvid, it exhibited omnivory and tool-use-related problem-solving behaviors compared in literature to New Caledonian crow studies and experiments by cognitive researchers at Oxford University and Max Planck Institute for Ornithology. Diet consisted of native fruits, invertebrates, eggs, and carrion, linking ecological roles with plants like Māmane and interactions with fauna such as the ʻIo and introduced mammals documented in reports by University of California, Davis and Hawaii Pacific University. Social behavior included flocking, cooperative roosting, territorial displays, and complex alarm calls studied by behavioral ecologists publishing in venues like Behaviour and Animal Behaviour. Nesting occurred in large canopy trees, with breeding biology recorded by observers affiliated with National Park Service field programs and the Bishop Museum.
The species was declared extinct in the wild by the IUCN after the last wild individuals disappeared, prompting listings under the Endangered Species Act and emergency measures by the U.S. Fish and Wildlife Service, Hawai‘i Department of Land and Natural Resources, and NGOs including the Audubon Society of Hawai‘i and Conservation International. Primary threats included habitat loss from land-use change tied to plantation agriculture documented in historical analyses by Bernice Pauahi Bishop Museum researchers, predation and competition from introduced mammals such as Rattus rattus, Cat, and Small Indian mongoose, disease risks like avian malaria linked to Culex quinquefasciatus and studies by Centers for Disease Control and Prevention, and the cascading impacts of invasive plants and ungulates recorded by the Nature Conservancy and Island Conservation.
Captive programs began with facilities at the Keauhou Bird Conservation Center, the Hawaii Endangered Bird Conservation Program, and partnerships among San Diego Zoo Global, the Tokyo Zoological Park Society, and the Denver Zoo. These programs incorporated husbandry protocols, behavioral enrichment, and pre-release training modeled after reintroduction work for species like the California condor and Kakapo. Reintroduction attempts into managed reserves employed predator control, disease surveillance, and adaptive management guided by researchers from the University of Hawaiʻi, US Geological Survey, and international collaborators from BirdLife International. Successes included improved captive population viability, while setbacks involved mortalities from predation and pathogen exposure noted in post-release monitoring by the Pacific Cooperative Studies Unit.
The species holds deep significance in Native Hawaiian culture, featuring in chants, moʻolelo, and as a ʻaumākua in genealogies recorded by kupuna and scholars such as Mary Kawena Pukui and Samuel Kamakau. Conservation engaged community groups including Hawai‘i Community Foundation, local iwi and moku organizations, educational outreach with Kamehameha Schools, and ecotourism stakeholders. Collaborative projects linked traditional knowledge and Western science through partnerships with entities like the Office of Hawaiian Affairs, Hawaiʻi Community College, and volunteer networks coordinated by The Nature Conservancy in Hawai‘i.
Category:Corvus Category:Endemic birds of Hawaii Category:Critically endangered animals