Clangula clangula americana. Lake Umbagog, Maine. 1897. On the way over to the Lake House this morning we landed May 12. at Paeslee's spring. Just as our boat reached the shore a female Whistler flew from a large hole in a big yellow birch which stands near the mouth of the brook and on the very edge of the water at this season. I had heard that there was a nest in this tree last season and I was looking directly at the hole when the bird came out but, nevertheless, I did not actually get my eye on her until she was in the air. She started when we were about 20 ft. from the base of the tree and flying heavily past us, her wings whistling audibly but not very loudly, alighted some fifty rods off on the flooded meadow. Half-an-hour later and again in the afternoon I saw her in company with her mate fly into the cove where the nest is situated. The hole is a natural cavity nearly two feet in height by a foot in width with its edges everywhere rounded in by bark. The tree apparently alive and, save for this cavity, sound. The hole is about 20 ft. above the ground. May 15. Watrous visited and examined the Whistler's nest at the mouth of Peaslee's Brook this morning. It contained nineteen eggs, all of the same type as regards both shape and coloring. The female was not sitting either yesterdgy (when I rapped on the tree) or to-day. The nest was a little more than arm's a length below the entrance. The eggs, Watrous says, were 25.