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.
FPV migration paths. Well supported migration paths (i.e., BF > 5) among countries are depicted. The edge color is proportional to the base-10 logarithm of the migration rate. The location of each country has been matched with its centroid.
