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.
Reproductive span versus average clutch size during the reproductive span for 1000 simulated Mute Swans. Reproductive span is defined as the number of years between the ages of first and last reproduction. The thick black line shows the average clutch size by reproductive span across individuals. The size of the grey circle at a point denotes the number of individuals at the point.
