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Dryad

Data from: Controlling trapping, overgrazing and invasive vegetation is key to saving Java's last population of the Black-winged Myna

Data files

Feb 22, 2022 version files 2.43 MB

Abstract

The Black-winged Myna (Acridotheres melanopterus) is an Endangered passerine endemic to the islands of Java and Bali, Indonesia. Illegal trapping to supply the cage-bird trade has led to its near-total extinction, with the global population estimated to number fewer than 100 individuals. The only known population of Black-winged Mynas on Java occurs at Baluran National Park (BNP). These data were generated to meet the two primary aims of the linked paper: the first was to estimate the Black-winged Myna (Acridotheres melanopterus) population size and range at BNP; and the second was to use species distribution modelling to evaluate the potential suitability of areas currently unoccupied by Black-winged Mynas across BNP to identify priorities for management intervention. We carried out line-transect distance sampling following the standard distance analysis method to estimate the population size. A total of 56 detections of groups of Black-winged Mynas were recorded along line transects and are included in the dataset. These records are associated with the land cover type for that segment of the transect, the perpendicular distance of the record to the transect, and the survey effort associated with each transect. To produce the species distribution model, we used three predictor raster layers along with all Black-winged Myna presences recorded (not freely available, see below) and a generated set of pseudo-absences. The dataset contains both the raw data used to create the land cover classification as well as the final raster. The raw data used to produce the habitat classification contains classified points (n = 426) from across BNP, which were used as a training and test data for a random forest land cover classification.