6. Note regularly in notebook all "pick-ups", that is, odd skulls or fragments of animals of whatever sort or source, serially numbered along with specimens of the more usual sort. Give full information, as with odd skulls secured from trappers. Label all such specimens adequately, as elsewhere described. Keep frequent censuses of diurnal birds and mammals, with locality preferences indicated. These censuses, if short, need not be entered on formal census sheets. When leaving a well-worked locality, enter a summary of species observed, with remarks of a general nature, such as re- late to local conditions of terrain, human activities, etc. Where feasible, interview old residents, trappers, National Forest and National Park rangers in each locality visited. Always record accurately the name, official position or occupation, and address of each person giving information; give also your opinion as to his reliability. Note general attitude of men inter- viewed as to game laws and conservation and record specific comments, complaints or criticisms. Ascertain present numbers and distribution of large mammals and birds as compared with former status. So far as possible get definite statements expressing ratio of abundance now, compared with a definite number of years back. Record fully all evidence as to human in- fluence upon original or "natural" balance. Record present economic relations of vertebrate animal life, that is, effect on agriculture, stock raising, etc., with full details. Note opinions as to whether species should be protected or destroyed. Describe local methods of capture or destruction; give your opinion as to their effectiveness and justification. Opportunity offering, record detailed observations on effects upon vertebrate animals, of severe storms, floods, forest, chaparral or prairie fires, over-grazing, lumbering, road-building, or tree-planting.