removed what thin and scattered herbage had become interposed. It sat quite motionless, the large eye shut, but occasionally opening to a very limited extent so as to show a long black slit.
10.30.—The low sleepy "churr" of a Nightjar from neighbouring fir-clump. Left a little after 10.30.
At about 11 a.m. crept up behind a bush, near which sat another Nightjar with young birds (I had disturbed this family three or four days before, when the old bird spun along the ground as if hurt), From here I could see the bird sitting just as the other one did on her eggs with a young one on each side of her. This I did not remark till one of the young birds moved and then shuffled itself more under its mother's breast, causing her to sit with the head held higher. I then saw both this and the other young one for the first time. Just then (11.25) the old bird either saw me or suspected my presence, and went off the nest, spinning over the ground in various directions. She then flew to a small bush near by, and sat there, uttering a note like "chook chook chook." Shortly after she flew off and out of sight.
11.30.—Bird returned to a bush close to the one she had left, and again uttered the note "chook chook"; then sat silent.
11.55.—Bird left the bush and flew around evidently disquieted. At 12 I came out, but before leaving walked to where the young birds had been, and where I had seen them after the mother had flown away. To my surprise they were gone, and, though I looked carefully all about, I could not find them anywhere. The "chook chook chook" therefore of the mother may have been the danger signal.
12.30.—Came back to the first bird, and found it (assuming it was the same) still sitting, but in a changed position, the head being now turned the other way. This time I was entirely deceived by the bird's resemblance to an inanimate object (though the bird I had just left had not deceived me). Not catching the outline of the tip of the wings and tail across the dry stalk (to which I had become accustomed) my eye rested full upon it, and I thought I was looking at a piece of fir-bark, one of those amongst which it sat. I, in fact, looked for the eggs upon the bird, for I knew the exact spot where they should be. But as I should have seen them at once, owing to their light
