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.
Virus construct is indicated in green (GFP), black (FoxP2.FL), and red (FoxP2.10+). Below, time singing is indicated on a blue-red color scale where the samples from birds that sang the most are colored the deepest red.
