Jan., 19222 NOTES ON THE DIPPER IN YELLOWSTONE NATIONAL PARK ZA 
out by the birds and later rebuilt. A ball of green in July, this second nest 
even had new grass growing from it to a height of more than a foot. J am 
under the impression that three birds were brought to maturity from the four 
white eggs this nest contained. At any rate a full-fledged youngster was seen 
in the vicinity on July 3. 
Another nest was on the bank of the Lamar River facing west over ripp- 
ling water just below Rose Creek, and built into a hollow between two harder 
layers in the gravel. It was like the first, but had a unique location in that 
there were no falls nor rapids near, and consequently no spray to keep the 
moss green. A third nest was found April 20, on another boulder in the Gar- 
diner, three feet above the water. It was similar in every way to the nest 
described except that the opening had a portion of the nest material projecting 
out, like a porch, over the entrance, the birds going in from below. 
In the far western part of the Park, I located a nest, like the one described, 
placed two feet above the swiftly running water on a rock in the middle of 
Campanula Creek. It faced south, but as usual was on the downstream side. 
It was like the third nest in being entered from below, but the entrance was 
gourd-neck shape and made of mud. Four white eggs were being incubated 
on May 20, and the mother stuck so closely that she would not leave until I 
struck the outside of the nest ball: At the foot of an artificial waterfall near 
the Power Plant at Mammoth, was a nest similar to the first described, in the 
erotch of a dead log. However, this nest was on top of its support and not on 
the side. ; 
One summer there was a Dipper’s nest beside Rustic Falls near the heavily 
travelled Golden Gate road. It was about eight feet below the edge of the 
Falls and three feet to one side of the falling water. It was so totally inacces- 
ible that I could not reach it, and so I learned little about it except that nest- 
lings were being fed on July 4. It was located 7300 feet above sea level, where- 
as the lowest of the nests here described (one of those along the Gardiner 
River) was at 5400 feet elevation. 
. Apparently, as with other species, Dippers’ nests are very characteristic 
in size, Shape, material, and location, and can be identified at a glanee. Still 
there are many modifications in minor particulars. 
Yellowstone Park, Wyoming, April 7 UZ il 
