Sullivan, J Cape Simpson, Alaska July 24 (cont.) of camp. Decided to hike over to the cabin today. It was still warm and the mosquitoes and crane flies were moving around. In a wet marshy area, a black-bellied plover (white rump) flew up and alighted some 50 feet away. Took it for a specimen. The tundra sloped gradually up to the cabin and was drier on the higher part of the slope. Small tundra pools with phalaropes, R-b.s., pectoral s., Bairdi s., and semipalm. s. lay scattered below the beginning of the slope. Three pomarine jaegers flew toward me from the north. Two of them passed closely overhead calling. Then the 3 commenced hunting - flying low and swooping over the tundra. One of them badgered a snowy owl, that flew toward the cabin. The jaegers pursued. The owl alighted on a high mound; the jaegers dived at it with a screech. The birds moved on out of sight behind the hill. Saw about 100 caribou feeding some 300-500 yards to the SE from the top of the hill. Bulli in velvet. The "cabin" was actually a wanigan - 4 ft high and 10 ft x 8 ft. The interior was bare - a built-in bench, and old equipment lay all around the outside. Rain clouds were moving in from the SW so I started back to camp. Some rain fell on the way back. No new species seen. Durham talked about [illegible]