BirdsCaribbean brings you highlights from the Journal of Caribbean Ornithology in our feature “Just Published in JCO”. Here, Zoya Buckmire, the Lead Copy Editor for the Journal of Caribbean Ornithology, gives us a behind-the-scenes look at various research on the Critically Endangered and endemic Ridgway’s Hawk.
Few things are more exciting than the rediscovery of a once-extirpated species, and the case of the Ridgway’s Hawk (Buteo ridgwayi) is no exception! This Critically Endangered raptor is endemic to Hispaniola (Haiti and the Dominican Republic), but despite its historically widespread distribution, it had not been spotted in Haiti since 1962. A chance encounter on one of Haiti’s satellite islands prompted hope and a follow-up study as Anderson Jean and colleagues sought to confirm their suspected sighting of the species. Thus began an epic scavenger hunt to rediscover this unique hawk on the Haitian side of Hispaniola! The authors shared a behind-the-scenes look at their discovery and their ongoing work to conserve the Ridgway’s Hawk.
The first sighting in 2019 was entirely by chance—or rather, by fate. Anderson Jean and Maxon Fildor were conducting a rapid ornithological assessment of Les Cayemites, two islands off the southwestern coast of Haiti, as part of a baseline study for the recently declared Baradères-Cayemites protected area. They were compiling information on the terrestrial vertebrates present to inform the management plan for the region. It was then that they spotted two raptors in flight—rushing to document what they could, they speedily took pictures, videos, and audio recordings to aid in identification. One of those two birds was later identified as a juvenile Ridgway’s Hawk, the first sighting of the species in Haiti in over 50 years, and the first sighting for Les Cayemites in over a century.
With this confirmation, the authors returned the following year with a purpose, partnering with The Peregrine Fund to conduct systematic surveys on the Baradères Peninsula and both Petite and Grande Cayemite. Between 2020 and 2021, the group detected as many as 19 Ridgway’s Hawks in the region—a veritable population! And not only is a population present, it also has the potential to persist as the birds are breeding.
The authors describe their most memorable moment as the instance, in 2021, when they found two nests on Grande Cayemite for the first time. Whilst the nest was located high in a tree on a weak branch too high and risky to climb, the evidence of breeding was enough. On the smaller cay, Petite Cayemite, they have only observed one breeding pair to date, but that pair has nested every single year since they were spotted in 2019. Another exciting development is that the authors banded their first Ridgway’s Hawk chick in 2023, which will surely provide more insights to this ongoing research.
Ultimately, Jean and colleagues hope that their research will contribute to the body of knowledge on this charismatic species, and help conservationists understand the causes of population decline and to increase the population size in Les Cayemites. They are continuing their search in nearby areas like Pestel, Grand Boukan, and Gonâve Island. Although White et al. did not find any sign of the species in their 2012 raptor survey of Gonave Island, it is possible that Ridgway’s Hawk have recolonized the island in the decade that has since passed. Anderson Jean and his colleagues hope to eventually witness the reintroduction of the species throughout its historical range.
Amidst this exciting rediscovery in Haiti, on the other side of the island of Hispaniola, another fascinating investigation was underway! Samantha Hagler and colleagues studied the breeding behavior of the species—looking particularly at pre-breeding behavior—observing and recording the birds to gain insights into how they form and strengthen pair bonds. This research supports ongoing conservation efforts to restore the Ridgway’s Hawk population, including a past project by The Peregrine Fund that translocated hawks to create a new population in Punta Cana. Translocating the hawks was a challenge within itself, with initial successes limited by high mortality rates due to power poles near the sites. Dwyer et al. document the creative solutions that had to be used to minimize hawk mortality, leading to eventual success of the program.
At the newly established population in Punta Cana, Hagler et al. tracked three established breeding pairs to compare them (and their behaviors) to the source population in the Los Haitises National Park. Interestingly, pre-breeding behaviors actually differed between the two groups. This could be a function of the populations’ size, density, or different levels of development—and raises even more questions that will be critical to better understanding and conserving the species.
Between these two populations in the Dominican Republic and the newly found population in southwestern Haiti, the future of the Ridgway’s Hawk looks brighter than in previous years. Thanks to the award of a BirdsCaribbean Betty Petersen Conservation Fund grant, Anderson Jean is continuing his urgent work to map and protect Ridgway’s Hawk populations in Haiti. His surveys will be further extended to the larger island of Grand Cayemite. To additionally address anthropogenic threats, the team will initiate an educational campaign directed at local communities, especially schoolchildren and farmers. Outreach materials will be distributed in the communities and a special curriculum will be presented in local schools.
We look forward to further research and reports on this important endangered and endemic raptor, as it provides hope for the conservation of other raptors throughout the Caribbean.
The Journal of Caribbean Ornithology publishes the peer-reviewed science on Caribbean birds and their environment that is so important to inform conservation work. All of the publications are free and open-access.
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