Figure 1.
Assumed phylogenetic relationship between the avian species used in the present analyses, as derived from the phylogenetic analysis reported by Hackett et al. [16].
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.