In your experiment test the height monarchs disappear from view, both from the naked eye and when using binoculars. Sometimes they will stay up until just about dark. In deserts they come down much earlier, perhaps as early as noon. It's not known what brings them down. If they fly at 11,000 feet they could certainly be above some clouds.
Clouds help to spot monarchs.
That is, you can see a monarch against a cloud much more easily than you can see one in clear air. If you saw a group of them against a cloud, and knew the height at which clouds began that day, you would at least know the upper limit for the group you were observing. In the body of EACH message, answer ONE of the questions above. Copyright 1999 Journey North. All Rights Reserved.