2018 Western Gulf Coast Mottled Duck Survey

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2018 Western Gulf Coast Mottled Duck Survey

This report summarizes the 2018 status of the breeding mottled duck population along the Gulf  Coast in Louisiana and Texas.  These results are based on an aerial survey conducted April 9‐12,  2018 as a joint effort of USFWS Division of Migratory Bird Management, Texas Parks and  Wildlife Department (TPWD), and Louisiana Department of Wildlife and Fisheries (LDWF).  This  experimental visibility‐corrected survey has been conducted since 2008 using airplanes and  helicopters to count mottled ducks along transects within their breeding range in both states.  During this 11‐year period the survey design has been modified in order to achieve better  precision in the visibility correction factor (VCF) and the resulting population estimates.  We  report here the population estimates for 2018, and compare these to those from 2017. 

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