Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Each number corresponds to a collection site described in Table S1 with numbers 8 to 20 representing populations in the Big Bend region of Texas, USA. The inset map shows the approximate map location within the USA.
