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.
Mean ±s.e.m. social rank of partners compared with singletons (i.e. those individuals without a partner) across Blocks 1–5, and the same data collapsed across blocks. Blocks 6–7 are not represented as only one bird remained a singleton during this period.
