#Us bird population density map update
#Us bird population density map plus

We illustrate our approach for the 1,151 terrestrial bird species occurring from Mexico southwards through South America for which BirdLife International and Handbook of the Birds of the World estimate resident plus breeding ranges <125,000 km 2, and for which data are available. We introduce a novel approach to producing range maps to address these difficulties, capitalizing on the increasing availability of high-resolution remote sensing data and abundant crowd-sourced field observations.

#Us bird population density map update

Compiling them takes considerable effort and it is time-consuming to update them in response to both changing knowledge from new presence records and changing landcover and habitat availability. Species range maps play vital roles in ecology, biogeography, and conservation. The views expressed in this publication do not necessarily reflect those of IUCN. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: The data is now hosted in an approved data repository (OSF) and the updated link is provided in the Acknowledgements: ( ).įunding: The authors thank their home institutions for providing support.Ĭompeting interests: The authors have declared that no competing interests exist. Received: JAccepted: OctoPublished: November 24, 2021Ĭopyright: © 2021 Huang et al.

Mousseau, University of South Carolina, UNITED STATES (2021) Batch-produced, GIS-informed range maps for birds based on provenanced, crowd-sourced data inform conservation assessments. The important finding for conservation is that threatened species are generally more widespread than previously estimated.Ĭitation: Huang RM, Medina W, Brooks TM, Butchart SHM, Fitzpatrick JW, Hermes C, et al. Some 40% of Critically Endangered, 43% of Endangered, and 55% of Vulnerable species have Areas of Habitat larger than their published ranges, compared with 31% for Near Threatened and Least Concern species. Interestingly, there are substantial differences between threatened and non-threatened species. Our results show that on average, Areas of Habitat are 12% larger than published ranges, reflecting the often-considerable extent that eBird records expand the known distributions of species. This reflects how little habitat within suitable elevation ranges exists within the published ranges. Previous estimates of Areas of Habitat were constrained within the published ranges and thus were, by definition, smaller-typically about 30%. Users can interrogate the maps produced to see details of the observations that contributed to the ranges. (Area of Habitat is the habitat available to a species within its range.) We combine existing range maps with the rapidly expanding crowd-sourced eBird data of presences and absences from frequently surveyed locations, plus readily accessible, high resolution satellite data on forest cover and elevation to map the Area of Habitat available to each species. We develop a systematic approach of batch-processing range maps and derived Area of Habitat maps for terrestrial bird species with published ranges below 125,000 km 2 in Central and South America. Given the pace of change of knowledge about species distributions and shifts in ranges under climate change and land use, a need exists for timely mapping approaches that enable batch processing employing widely available data. Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds.Accurate maps of species ranges are essential to inform conservation, but time-consuming to produce and update. Population size:ĭecreasing Extent of occurrence (breeding/resident):īirdLife International (2024) Species factsheet: Cinclus mexicanus. For these reasons the species is evaluated as Least Concern. The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (10% in ten years or three generations, or with a specified population structure). Justification of Red List category This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence 30% decline over ten years or three generations). Click here for more information about the Red List categories and criteria