Population structure and first generation migrants.

<p><b>(A)</b> Proportional membership (<i>Q</i>) of each São Paulo Marsh Antwren in the genetic clusters inferred by Structure (<i>K</i> = 3). This graphic represents each individual as a bar, and its membership probability in each cluster. Individuals <b>1</b> to <b>26</b>: Mogi das Cruzes population; Individuals <b>27</b> to <b>43</b>: Salesópolis population, and individuals <b>44</b> to <b>57:</b> São José dos Campos. Black arrows identify individuals indicated as first generation migrants. <b>(B)</b> Output graphics from Structure Harvester, indicating the higher value of <i>Ln P</i>(<i>K</i>) (left), and Δ<i>K</i> (right).