I came across an article in National Geographic, Sept 1959 by Dr Wm Beebe of Bathysphere and high altitude ballooning fame on observation of birds and animals in the forest. While he was using binoculars, I believe that these rules apply equally to photographers. (1) Move only when the wind blows and moves the leaves. (2) When a wild creature is near, keep eyes partly closed. Animals do not like to be stared at. (3) Hold hands high so that any movement is down, as leaves fall. (4) When listening to faint sounds, keep mouth slightly open (as lovers of music do in the top gallery of the opera). (5) Drab clothes are best, but a scarlet or blue shirt will do no harm if one keeps still. It is movement, not color which frightens wildlife. (6) If sand flies or mosquitoes are bad, do not be ashamed to use a repellant. A dozen mosquitoes biting at once may disturb the toughest observer. (7) When approaching a singing bird, take a step during each song: many birds will not notice. (8) Learn to squat East Indian fashion. It allows two slight shifts which alternately ease all muscles, and keeps you clear of wet surfaces and bete rouge (red bug). (9) When squatting, hold glasses close to nose, so they can be shifted to eyes with a minimum of motion. (10) Don't trust your eyes or memory when you can check and recheck. (11) A sudden yell or gunshot frightens wild birds for a few seconds, but the effect of a cough or a sneeze will last much longer. (12) A low monotone in speaking is less disturbing than a hissing whisper.