Trumpeter Lalo Census 225. mpson Yellowstone May 27, 1932 as that of the Calif. Thrasher. Once when the two were on a rock, each raised its his wings slightly over his back & bowed to the other then stretched its head high. This bow was performed by both birds about 3 times in succession, then not seen again. The Trumpeter Swans were at their nest when we arrived (about 9:00 AM.) One bird was sitting with head tucked under wings. The other was feeding nearby. As soon as we started down toward the lake both birds left the nest & hid in the tules. When we left the lake about 12:30 one away was back on the nest. Wright saw a male Javager at Yellowstone Bridge. The Arnolds reported seeing one a week ago. This is the first record we have this year.