ʻAlalā on Maui: a release is only the first test

The ʻAlalā, or Hawaiian crow (Corvus hawaiiensis), is endemic to Hawaiʻi Island. It is an intelligent forest bird and an important consumer and disperser of native fruits. After the last wild birds disappeared, the species survived through captive breeding. That did not mean its recovery was secure: a breeding programme could preserve birds, but it could not by itself restore a functioning wild population.

In November 2024, a pilot release moved five captive-bred ʻAlalā into forest on East Maui. The site was selected in part because it lacks the native Hawaiian hawk, the ʻIo, that complicated earlier releases on Hawaiʻi Island. The choice did not remove every risk. The birds had to learn to navigate an open forest, find natural food, cope with weather and remain healthy while project staff monitored them.

Why earlier releases struggled

Earlier release attempts on Hawaiʻi Island did not establish a persistent wild population. Predation by the ʻIo affected some birds, and released ʻAlalā also faced other hazards in a changed forest. Those experiences altered the design of later attempts. Choosing East Maui reduced exposure to one locally important predator, while acclimation, anti-predator conditioning and post-release monitoring were built into the programme.

Release methods also need to match the bird’s social life. ʻAlalā are not solitary objects that can simply be placed in suitable trees. Young birds learn from one another, forage together and develop skills over time. In 2025, Hawaiʻi’s Department of Land and Natural Resources described the first Maui cohort learning to use native fruits, seek shelter in trees and strengthen flight and landing in forest conditions.

Monitoring has been practical as well as scientific. GPS transmitters help teams understand where birds move. Feeders provide a temporary safety net while the cohort develops natural foraging skills and allow field staff to observe body condition. Such support can improve survival, but it also means that early success is partly managed. The long-term objective is to reduce dependence on intervention as the forest becomes a place the birds can use safely.

The forest is part of the recovery plan

ʻAlalā evolved among native Hawaiian plants and animals. Forest degradation and introduced mammals changed nesting and foraging conditions; introduced mosquitoes carry diseases that can devastate native birds. Climate warming may allow mosquitoes to reach higher elevations, reducing the amount of disease-safe habitat available to some species. These pressures do not act in isolation, and their effects differ across locations.

Habitat management, predator control and disease risk therefore sit beside captive breeding and release. A bird can be healthy when it leaves a breeding centre and still be unable to survive if its new home lacks food, shelter or safe nesting sites. The project’s need for field observation is one reason success is evaluated through behaviour and survival rather than the number of birds moved.

The return of the crested ibis to Noto offers a separate example of why reintroduction is a sequence of tests: release, survival, breeding and habitat suitability each answer a different question. The two birds occupy different ecosystems and face different threats, so the specific management measures cannot simply be exchanged.

What happened after the first Maui release

By April 2025, the five released birds were reported as healthy and were exploring forest habitat. Project staff described observations of native-plant foraging, sheltering during storms and coordinated movement within the group. These behaviours were promising because they were signs of adaptation beyond the protected breeding environment. They remained observations of a small pilot group, not evidence that every captive-bred bird would behave the same way.

In November 2025, two additional birds were moved to a field aviary as a planned expansion of the Maui flock. The distinction between arrival at a field aviary and release into the forest matters: acclimation is part of the process, not proof that the birds had joined the free-flying group. Hawaiʻi’s project information continues to describe close monitoring and planning for future releases.

The first five birds were still the clear test of whether a cohort could persist, learn and use the East Maui forest. Their progress can inform a future release on Hawaiʻi Island, but only after managers assess predator risk and habitat conditions there. A result at one site should not be treated as a universal answer for the species.

What recovery would look like

A self-sustaining ʻAlalā population would need to survive, reproduce and raise young in the wild over multiple generations. It would also need enough safe habitat to avoid relying on a single release site. Those goals require a continuing partnership among conservation agencies, breeding centres, researchers and local communities. The work has cultural importance as well as biological value, and local knowledge is part of the restoration effort.

For now, the Maui pilot shows that captive-bred ʻAlalā can be returned to forest under a carefully supported plan. It also shows how much remains to be tested. The species has not been rescued simply because it is visible outdoors again; recovery depends on whether the forest can become home without constant human scaffolding.