Fig. 1.
The study area in province of Cádiz, south Spain: the grey polygon (bottom) is the location of colony site and the asterisk symbols show the location of observers. The observers’ angle of view is shown in solid and dashed line
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.