2017 Western Gulf Coast Mottled Duck Survey

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2017 Western Gulf Coast Mottled Duck Survey

This report summarizes the 2017 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 10‐ 13, 2017 as a joint effort of Texas Parks and Wildlife Department (TPWD), Louisiana  Department of Wildlife and Fisheries (LDWF), and USFWS Division of Migratory Bird  Management.  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 10‐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 2017, and compare these to those  from 2009 to 2016.

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