Collops Humeralis May 21, 1942 - Sharp's Creek, Kings R. Canyon, Fresno Co., Calif. one was around she would stay there pretty consistently. Usually an involuntary movement on my part in chasing flies away sent her from the nest after perhaps a minute or two. After everyone was gone I counted 8 minutes as her length of one stay in the nest. She flew to the Douglas Fir in back of her - could not see her after that and returned in about 3/4 min. Stopping a moment on the small limb previously mentioned and after a stop just under the branch, a quick turn over under & over into the nest. Time in nest = 3 min. Someone's approach frightened her this time. Her release was observed after a great deal of zigzagging & circling. It was remarked that regardless of the side from which the nest was approached she always entered it from the same way side; that away from the path. This time after her stop on the branch below, she went away to the other side of the branch & this time, approached from the other direction thus not completing her sweep under & over to the other side of the nest. We changed position from one side of the nest to the other & on her return to the nest, she faced in the opposite direction this time i.e. faced us. Then we got up and after a little, she entered the nest facing the direction of the one by below until last when frightened.