July 20, 1946 Poison Oak Lake, Linn Co., 9 a.m. I climbed to the nest which I found in the ash tree on the 18th, but the limbs weren't strong enough to permit my actually reaching the nest. I could see in it, and that is about all. There was one large downy young with a bill over 1 1/2" long. It looked like there might have been another downy young, but it could have been the bend of the wing of the other that I saw moving. There were also definitely at least 2 pale blue eggs in the nest. The adult Green Heron left the nest before I approached with'25' this time (On the 18th, she took off the nest after I was under it). The adult stayed quite close all the while I was climbing to the nest. July 20, 1946 S stewart Lake, Benton Co., 2-3 p.m. I sat next to an open thicket of willows and "squeeked my lips" and before long I had attracted well over a dozen Warbling Vireos and Yellow Warblers, both adults and young. It was a thrill indeed to have them all perched there in front of me with that"curiosity-pitch" to their heads. Also a Robin, a Towhee, a 1/4 Russet-backed Thrush, a Seattle Wren, and a Song Sparrow came up to see what was what ! The Vireos and YellowWarblers were feeding everywhere from the mud under the willows, in the willows, and out on the leaves of the yellow Pond Lilies. July 22, 1946, "Poison Oak" Lake, Linn Co. 10 - noon. One adult Green heron was on the nest, and as we watched another flew into an oak nearby, and slowly worked its way from tree to tree in a circle until it was in the nest tree, and the bird on the nest then left and walked out to the edge of the tree and flew to a snag 100 feet or so away. Theother bird then stayed at the nest. The bird that had been on the nest spent its time preening in the sun. I saw the same performance two days before, and now I'd like to know how long the nest shifts are, or if it is just as long as it takes the free mate to find some food for the young. When we finally approached the nest, the adult stayed fairly close and permitted us to take some movies of it in a nearby oak tree. We put a ladder up to the nest, and when I looked in this time, two young were perched around the edge of the nest. Also there were 3 eggs. Not quite a robin's-egg-blue color. They were quite dirty from activities of the young. Last time, only down could be seen. It was quite whitish. Now it is a deeper gray, and pinfeathers up to 3/4" long can be seen growing on the wings, etc. One bird had the crop protruding a great deal, as if it had just been fed. Total length from bill to tail might be 6"-7" now. One bird is just slightly smaller than the other, so I assume that the other three eggs are failures, or the young would have been out by now. The leaves, branches, and pond lilies below the nest are thoroughly "whitewashed". The top half of the nest is quite flimsy, and aerated, as you can be below the nest, and see the young in the nest OK. It is a solid mass of twigs under the center of the nest however. The young would freeze in the nest with their heads upright and necks held straight up, also. July 23, 1946 - Stewart Lake, north of Corvallis. Anthony Green Heron, young perched on a snag near the duck trap this a.m. Mallard - captured a female that couldn't find its way out of the trap, and it was in its summer molt, with primaries only 1 1/2" long. It couldn't fly. Valley Quail - 3 very busy giving scolding-talking notes that sounded like Gray Digger. Perched as high as 30 feet up an ash tree while doing so. Belted Kingfisher - just one of them was present this a.m. when I came to the lake. A Blue Heron in juvenile plumage came into the lake and landed with a "swoosh" near one sheltered edge among the pond lilies.