Thompson 1931. Yellowstone Natl. Park Jervey Lake Trip with G.M.H. July 31, 1931. We rode horses to Jervey Lake via Pelican Creek. The day was threatening and rainy. Canada Geese were seen in many flocks ranging from 4 to 65. An attempt was made to count them but they flocked back & forth so much that no count could be obtained. No young were seen. The geese were alwa found standing in the tall marshy glass along the valley floor. Many ducks with young were seen on the creeks. Mallard, Barrow's Goldeneye, and Scamp were identified. A pair of Trumpeter Swans was found at Jervey Lake with a family of 6 cygnets. The swans upon seeing me, left the lake and walked across a slough 1 mile to an adjacent lake, just as they do at Trumpeter Lake. Jervey Lake is an ideal swan nesting lake; shallow rimmed with reeds & rushes, and about 2 by 4 mile in length & breadth. About 200 ducks were swimming on the lakes but were too far away to identify. A pair of Sandhill Cranes