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.
Latency to the completion of a problem-solving task (removing a weighted, transparent cover from a well containing a wax worm) in black-capped chickadees. Pre- and post-treatment exposure of a wax worm on the testing apparatus controlled for motivation, the tendency to feed on the floor of the cage and habituation to the testing set-up. Filled circles, Kansas; open circles, Alaska.
