MacLean 1969 Journal (12 June) ano field exclosure studies of adult survival. 13 June Barrow, Alaska Spent the morning censusing hemmus nests in Britton's Area for predation. Predation was high - ca. 1/3 of nests. (later Dick Andreas and his assistant reported capturing to Mustella rixosa by hand near the new cake-ester.) Hawes assisted in this. Tom Custer caught a live sub-adult Dicrostonyx under some junk in Britton's area. In the afternoon went out across Family Lagoon creek (North crossing) to look at newly exposed area there. A number of bairdii singing continuously. The only shorebirds actually occupying the area were a few melanotos. Collected an actively displaying ♂, and he topped 100 g! Caught a live of hemmus for Hawes which also topped 100 g.. Heard a displaying Dowither very nearby, but couldn't actually see it. Pitelka and Custer took the vehicle in the evening, so I stayed in to catch up on field notes. 14 June Barrow, Alaska the first Ranunculus of the year -