Isaac hiked up Blue Robin Canyon to look for Rock Ptarmigan, but did not find any. There would be a continuing search for Rock Ptarmigan throughout the trip. When we arrived back at the old Attour Base, a number of people went back to the boat, but Thor and I and a few others joined John Puschock and Isaac Helmericks to bird along Casco Cove and the runways before dinner. Near the end of the east west runway and the mouth of the Peaceful River, we started hearing calls overhead that were Aleutian Terns. There was a flock of about 12, and several came low enough out of the mist and clouds that we saw the white forehead, the gray under-parts on the body and the black secondary bar on the under-wings. The calls are reminiscent of House Sparrows chirping. Then Isaac picked up two Pacific Golden-plovers flying over the runway. We saw the incomplete black under-parts with white under-tail coverts and heard the call that is different than American Golden-plover. We heard other terns calling, that John and Isaac thought were Arctic terns, but the possibility for Common Tern (longipennis), the Asiatic race, made them less sure. However, now that I am back from Anchorage and have heard Arctic Terns recently, I believe that we heard Arctic Terns. However, I waited to count Arctic Tern until I saw and heard them in Anchorage.
Slaty-backed Gull, Kittlitz's Murrelet, Marbled Murrelet, Ancient Murrelet, Aleutian Tern and Pacific Golden-plover raise the Big year total to 494.