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.
Flight performance curves of jackdaws and rooks flying alone or in isolated pairs. All data are calculated in the cruising flight mode. Error bars show the standard error of fwb and are smaller than the symbol size. Inset bird images are taken from one of the cameras (jackdaw wing is broader closer to the body than the outer parts, while the rook wing is more even size along its length). (Online version in colour.)
