On the morning of the first of November, the day after "losing" number 21, we heard her normal collar signal at the north end of the range. The explaination: another ewe, frequency 151.27, was previously fitted with a collar that is stuck in mortality mode. This ewe was in the same canyon as our number 21, who has a collar of frequency 151.26. The result was a clear and distinct FALSE mortality signal being received for number 21. We were unable to hear number 21's signal later in the day as she was evidently in a deep canyon far to the north of our search area. While searching for her at the top of the range we did take the time to check one of our remote cameras at the top and were rewarded with this photograph of a bobcat (Lynx rufus).