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.
Data sourced from grey literature and additionally data adapted from Global biodiversity information facility (https://www.gbif.org/). Maps are drawn using shapefiles from free sources (U.S. Geological Survey (USGS) (http://www.usgs.gov)) while icons are sourced from commons.wikimedia.org.
