FIGURE 2.
Eggshell strength as function of egg weight in thirteen bird species [adapted from Ar et al. (1979)].
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.