Nest Site Characteristics of Two Endangered Seabirds in Montane Wet Forests on the Island of Kaua‘i, Hawai‘i, USA

Raine, André F.; Driskill, Scott; Rothe, Jennifer; Vynne, Megan

doi:10.1675/063.044.0408

Cited by 5 publications

(3 citation statements)

References 34 publications

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“…Burrow searching was undertaken on two trips in 2018 (3 April to 4 May, and 16-20 July) and three trips in 2019 (6-9 Aug, 26-30 Aug, and 28-30 Oct). Teams searched the area identified by the tag data, concentrating on microhabitat features considered most suitable for Hawaiian Petrel burrows as identified by Raine et al (2021) on Kauaʻi. This included searching for burrows on steep slopes with a high density of native plants characterized by ʻōhiʻa in the canopy and uluhe fern in the understory, with special attention paid to the immediate area around larger trees, around large tree roots, and mossy walls with small caves at the base.…”

Section: Burrow Searchingmentioning

confidence: 99%

Using tracking technology to locate endangered ʻuaʻu or Hawaiian Petrel (Pterodroma sandwichensis) burrows

Raine¹,

Wang²,

Mossman³

et al. 2022

ACE

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The ʻuaʻu, or Hawaiian Petrel, Pterodroma sandwichensis, is an endangered seabird endemic to the Hawaiian Islands. Although its distribution on some of the islands is well documented, on larger islands such as Hawaiʻi there are significant distribution gaps. Previous work within the Puʻu O ʻUmi Natural Area Reserve (NAR) on Hawaiʻi strongly suggested that a breeding colony of the species was present, but active burrows had not been located making it difficult to focus management actions. Searching for burrows of this nocturnal burrow-nesting seabird had been particularly challenging in the NAR, as the birds are very rare, widely dispersed, and breeding in remote areas with dense vegetation and challenging topography. To locate active burrows, we employed the use of tracking devices to track breeding adults back to their burrows. Six data loggers (e-obs Bird Solar 10g) were attached to transiting birds caught using lights in 2018 and 2019. Overland locational data was then interrogated for concentrated areas of circling and ground activity. This resulted in several areas of concentrated activity and two different locations where tracked birds ended up transmitting from the ground. Burrow searching teams were then deployed to these areas and an active Hawaiian Petrel burrow was located. This represents the first active burrow ever documented in the NAR and the entirety of Kohala Mountain. Management actions have since been initiated to protect birds breeding within the areas defined by our tracking data. Logistical and methodological considerations inherent in the use of telemetry for locating endangered seabird colonies are discussed. Utilisation de la télémétrie pour localiser les terriers du 'uaʻu ou Pétrel des Hawaï (Pterodroma sandwichensis), espèce en voie de disparitionRÉSUMÉ. Le ʻuaʻu, ou Pétrel des Hawaï, Pterodroma sandwichensis, est un oiseau marin en voie de disparition, endémique aux îles Hawaï. Bien que sa répartition sur certaines des îles soit bien connue, ce n'est pas le cas sur les plus grandes îles telles que Hawaii, où des lacunes importantes de connaissance existent. Des travaux antérieurs sur la réserve d'aire naturelle (RAN) Pu'u O 'Umi sur Hawaii ont indiqué qu'il était fort probable qu'une colonie de l'espèce soit présente, mais aucun terrier actif n'a été localisé, rendant difficile la recommandation d'activités de gestion. La recherche de terriers de cet oiseau marin nocturne a été particulièrement difficile dans la RAN, car les oiseaux sont très rares et dispersés, et nichent dans des secteurs éloignés à végétation dense et à topographie difficile. Pour localiser les terriers actifs, nous avons utilisé des dispositifs de suivi destinés à suivre les adultes reproducteurs jusqu'à leur terrier. Six enregistreurs de localisation (e-obs Bird Solar 10 g) ont été fixés sur des oiseaux en transit capturés à l'aide de lampes en 2018 et en 2019. Nous avons ensuite scruté les données de localisation situées à l'intérieur des terres pour trouver des zones de concentration d'activité circulaire et au...

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Section: Burrow Searchingmentioning

confidence: 99%

Using tracking technology to locate endangered ʻuaʻu or Hawaiian Petrel (Pterodroma sandwichensis) burrows

Raine¹,

Wang²,

Mossman³

et al. 2022

ACE

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“…The Newell’s Shearwater faces numerous threats, which include collisions with powerlines (Cooper and Day 1998, Podolsky et al 1998, Ainley et al 2001, Travers et al 2021), the attraction of fledglings to artificial lights (Reed et al 1985, Telfer et al 1987, Ainley et al 1997, Cooper and Day 1998), depredation by introduced mammalian predators, including feral cats Felis catus , black rats Rattus rattus and pigs Sus scrofa (Raine et al 2020b), and the introduced Barn Owl Tyto alba (Raine et al 2019, 2020b), burrow takeovers by feral honey bees Apis mellifera (Raine et al 2022), and habitat modification within breeding colonies due to invasive plants and pigs (Duffy 2010). The Newell’s Shearwater also undoubtedly faces threats at sea that, while poorly known, are important issues for similar species of seabirds worldwide and could include marine pollution (Sileo et al 1990, Derraik 2002, Kain et al 2016), overfishing (Ainley et al 2014, Morra et al 2019), and the effects of climate change and bycatch (Gilman et al 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Lastly, the issue of powerline collisions, while known for many years, has recently been identified as being a critical reason for the dramatic decline of the species on the island (Travers et al 2021). On Kaua‘i, powerline collisions of Newell’s Shearwater and the Hawaiian Petrel Pterodroma sandwichensis (another endangered endemic seabird nesting in similar habitats on Kaua‘i (Raine et al 2022) have been quantified acoustically at the island level. However, there is a need to refine the methods used to split collision allocation between the two species, which can be achieved by understanding species differences in movement rates, dates, and diel timing.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the breeding phenology of the endangered ‘a‘o (Newell’s Shearwater Puffinus newelli) on Kaua‘i to better focus conservation actions and management decisions

Raine¹,

Driskill²,

Rothe³

et al. 2022

Bird Conservation International

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Summary The ‘a‘o, or Newell’s Shearwater Puffinus newelli, is an endangered shearwater species endemic to the Hawaiian Islands, with 90% of the world population found on Kaua‘i. Understanding the breeding phenology of the species is vital for identifying key periods for colony management actions and the timing and exposure frequency to infrastructure threats such as powerline collisions and light attraction. We used a combination of direct burrow monitoring and remote cameras at multiple colonies between 2012 and 2019 for a detailed assessment of the breeding phenology for this species. Breeding adults started arriving at the burrow in mid-April, some (but not all) underwent a two-week exodus in May and returned at the end of May to commence incubation. Incubation continued until mid-July. The chick-rearing period ran until the end of September. Fledging peaked in October with the last birds fledging towards the middle of November. Breeding was not synchronised, with a 59-day gap between the first and last fledging birds. The importance of this information to management actions is discussed, particularly in terms of directing management actions to key periods of vulnerability to introduced predators (such as peak incubation, chick emergence, and exercising prior to fledging), the precise timing of fledgling fallout related to light attraction, and directing colony-monitoring actions and translocation projects. We also consider the utility of the data in assessing species composition of powerline collisions and collision risk. Future work using acoustic monitoring is recommended for assessing the phenology of non-breeders and prospectors at colonies.

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The Impact of Light Attraction on Adult Seabirds and the Effectiveness of Minimization Actions

Raine,

Driskill,

Rothe

et al. 2024

Pacific Science

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Nest Site Characteristics of Two Endangered Seabirds in Montane Wet Forests on the Island of Kaua‘i, Hawai‘i, USA

Cited by 5 publications

References 34 publications

Using tracking technology to locate endangered ʻuaʻu or Hawaiian Petrel (Pterodroma sandwichensis) burrows

Using tracking technology to locate endangered ʻuaʻu or Hawaiian Petrel (Pterodroma sandwichensis) burrows

Evaluating the breeding phenology of the endangered ‘a‘o (Newell’s Shearwater Puffinus newelli) on Kaua‘i to better focus conservation actions and management decisions

The Impact of Light Attraction on Adult Seabirds and the Effectiveness of Minimization Actions

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