Birds vary greatly in their attitude toward a camera which has been erected near their homes; some species paying little attention to it, and, after a short time, coming and going as though it had always been there, while others are suspicious of any object which changes the appearance of their surroundings. With the latter special precautions are necessary, and unusual care should be taken in working about their nests lest they be made to desert it. The long-focus lens is here of great service, for it enables one to secure a sufficiently large image from a distance of ten or twelve feet. Even then it will often be necessary to conceal or disguise the camera by covering it with the green dark-cloth, vines, and leaves. A rubber tube or thread of requisite length is then attached and the exposure is made from a distance. A dummy camera, composed of a box or log wrapped in a green cloth and placed on a tripod made from saplings, may sometimes be erected to advantage several days before one expects to attempt to photograph the bird, who in the meantime becomes accustomed to it and quickly returns to the nest after the real camera has been substituted. The artificial tree trunk would doubtless be of assistance in some kinds of bird-at-the-nest photography, especially when one desired to secure pictures of the old bird feeding its young, and was obliged therefore to make the exposure at just the proper moment. In most instances, however, there is sufficient undergrowth in the immediate vicinity to afford concealment, from which with the aid of a glass one may take note of events. With the reflecting camera one may stalk birds on foot or with a boat, or “squeak” them into range by kissing the back of the hand vigorously, a sound which, during the nesting season especially, arouses much curiosity or anxiety in the bird’s mind. The decoys, blinds, batteries, sneak boxes, etc., of the sportsman are also at the disposal of the hunter with a camera, though I must admit that my one outing to photograph bay birds over decoys resulted in an empty bag. It was in the spring, however, when the bay birds surviving had experienced two shooting seasons and were exceedingly wild. In the fall, with birds born the preceding summer, one might be more successful. Birds may be sometimes brought within range of the camera by baiting them with food, and, after they have learned to expect it, placing the camera in suitable position. This may be most easily done when there is snow on the ground, at which time hunger makes most birds less suspicious of danger. [Illustration: 19. Catbird scolding.]