Dr. Cooper also found these birds around Fort Mohave in considerable flocks about the end of February, but all had left the valley by the end of March. About May 29 he found numbers of them towards the summits of the Providence range of mountains, west of the valley, and not far from four thousand feet above it, where they probably had nests. They were also common in July on the cooler plains towards the ocean, so that they doubtless breed in many of the southern portions of California, as well as at Puget Sound and on the Great Plains. Dr. Cooper states that in May or June the males rise almost perpendicularly into the air, until almost out of sight, and fly around in an irregular circle, singing a sweet and varied song for several minutes, when they descend nearly to the spot from which they started. Their nests were usually found in a small depression of the ground, often under a tuft of grass or a bush. Mr. Nuttall started a Shore Lark from her nest, on the plains, near the banks of the Platte. It was in a small depression on the ground, and was made of bent grass, and lined with coarse bison-hair. The eggs were olive-white, minutely spotted all over with a darker tinge. According to Audubon, these Larks breed abundantly on the high and desolate granite tracts that abound along the coast of Labrador. These rocks are covered with large patches of mosses and lichens. In the midst of these this bird places her nest, disposed with so much care, and the moss so much resembling the bird in hue, that the nests are not readily noticed. When flushed from her nest, she flutters away, feigning lameness so cunningly as to deceive almost any one not on his guard. The male at once joins her, and both utter the most soft and plaintive notes of woe. The nest is embedded in the moss to its edges, and is composed of fine grasses, circularly disposed and forming a bed about two inches thick. It is lined with the feathers of the grouse and of other birds. The eggs, deposited early in July, are four or five in number, and are described by Mr. Audubon as marked with bluish as well as brown spots. About a week before they can fly, the young leave the nest, and follow their parents over these beds of mosses to be fed. They run nimbly, and squat closely at the first approach of danger. If observed and pursued, they open their wings and flutter off with great celerity.