James M Hartshorne
9 Mar 1956
- Red Rocks Lake Nat. Wildlife Refuge
NOTES: Cover density: OPEN; CONVERSATIONAL NOTES GIVEN ON GROUND (SNOW) OR IN WATER. Sex: 230 UNKNOWN Based on the site, these almost certainly represent Trumpeter Swans, at the time recognized by some authors as C. c. buccinator - CAM - 27 October 2004.