KUKILA (E-Journal)
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Large population of Pied Imperial Pigeons Ducula bicolor on Belitung island, off southeast Sumatra
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Assessing the biodiversity value of degraded lowland forest in Sumatra, Indonesia
Full text linkForest degradation, forest fires, and wildlife poaching have devastated biodiversity in Indonesia. To assess the impact of forest degradation and the potential for recovery, we used birds as a proxy for biodiversity and assessed density estimates (hereafter density) in the degraded lowland forest of Harapan Rainforest Ecosystem Restoration Concession (HRF) in Sumatra. In this study, a total of 149 bird species (from 5,317 individuals) were recorded. Of the 103 species for which densities could be calculated, 45% were lowland bird specialists (i.e. species occurring below 200 m above sea level in Sumatra), including three globally threatened and 41 Near-Threatened species. Comparison with bird densities in degraded forest of Borneo revealed that there was broad similarity across taxa but three species had significantly higher density, and four had significantly lower density, in HRF. The mosaic of degraded forest habitats in different stages of regeneration in HRF appears to support more individuals of some species, especially woodpeckers, than the Bornean sites, but fewer individuals of other species. Determining bird densities is essential to establish population baselines, allowing comparisons between sites and over time. The present study fills one gap, but we urge others to conduct similar studies to provide a better understanding of the temporal and spatial variation in bird density in Southeast Asia’s degraded forests
First nest and juvenile plumage descriptions of the Ashy Robin Heteromyias albispecularis of Vogelkop Peninsula, West Papua
Full text linkThe current status of the critically endangered Caerulean Paradise-flycatcher Eutrichomyias rowleyi on Sangihe, North Sulawesi
Full text linkThe Caerulean Paradise-flycatcher Eutrichomyias rowleyi is one of eight endemic birds on Sangihe. Its remaining population is only known from primary forest in valleys between 390-674 m above sea level on Mount Sahendaruman. IUCN has categorized the species as Critically Endangered. The rediscovery of 19 individuals in 1998 sparked new hope of their continued survival. We conducted population surveys in 15 valleys on Mount Sahendaruman during May–June 2014. Our estimated population size of 34–150 individuals suggests that there has not been any significant increase. The small area of remaining primary forest on the mountain (519 ha) is assumed to be the main limiting factor on population growth. The conversion of forest into plantation remains the main threat to this species, along side changes of forest floristic composition, with introduced plants pushing into its habitat. Participatory agreements on area management that were formulated in 2005, including zoning system, should be revitalized and replicated forother villages to conserve the species
The first record of the undescribed “Spectacled Flowerpecker” (species novum) for Indonesia
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Surveys at Bagan Percut, Sumatra, reveal its international importance to migratory shorebirds and breeding herons
Full text linkThe Bagan Percut region of north-eastern Sumatra, Indonesia, is becoming well known for its large concentrations of migratory shorebirds. From January to June 2011 we made monthly counts of shorebirds and waterbirds at four mudflats and one heron rookery. Fifty-one species were recorded, including 35 migratory species, and eight breeding species in the rookery. We counted 20,114 migratory shorebirds (mudflats) and 45,648 breeding waterbirds (rookery) over six months of surveys. We observed >1% of the East Asian-Australasian flyway population of five species of migratory shorebirds: Nordmann’s Greenshank Tringa guttifer (globally Endangered), Lesser Sand Plover Charadrius mongolus, Pacific Golden Plover Pluvialis fulva, Eurasian Curlew Numenius arquata, and Ruddy Turnstone Arenaria interpres. Our results support the work of others that indicate that Bagan Percut is an important habitat for wintering, migrating, and summering shorebirds. We recommend that Bagan Percut be added to the East Asian-Australasian Flyway Partnership list of internationally important wetlands because the area meets all three criteria for inclusion