SOME ASPECTS OF CONSERVATION 259 A species may be rare because of man's activity. If it is a species thought to be disadvantageous to man, its extermination will not raise a ripple. If it is neither good nor bad, there will be a little ripple in some circles. If it is economically good there will be greater efforts to save it from extermination. Looked at any way, we have no right to exterminate any species deliberately and in cold blood. Control, yes; extermination, no. But a species may be rare for very different reasons—it may be on its way out anyway, or it may be rare in a locality because it is on the edge of its geographical range. This last must be true of many of our migrant birds, and rarer residents, and it certainly is true of many of the plants in our flora. Here they are rare; elsewhere they may be common, like our old friend Ophioglossum. Ought we therefore to set aside tracts of land for the preservation of these species? I venture to suggest that a botanic garden is the place for such as these if there is a need to have them on hand for study. We have a case of an area within the County, which has been fenced at considerable cost because of the so-called rare marsh species growing there. But these plants are only rare in Essex—further north they are in no danger of extinction. We have cases of such rarities actually being transplanted into reserves, and the local flora being butchered to create conditions ideal for the newcomer. Is this a wise deployment of time and energy? Taken to its conclusion, we ought to be planting coconut palms in our reserves; after all, they are extremely rare in Essex! This apparent frivolity hides an important truth. I believe a lot of conservation activity is promoted by the desire for one- upmanship. Take this case—"It would be nice", said one con- servationist, "to have avocets on our reserve". He, therefore, proposed submerging a most interesting and educationally use- ful piece of saltings under a freshwater lake in the fond hope that avocets would come. And this in a place miles from any known sites of avocets. Or, again, a most interesting beach was closed to everybody, layman and student alike, in the hope that the Little Tern would come and nest there. In the event, terns did not nest, but it was three seasons before the order to close was rescinded. I make these points, not as an anti-bird man, but to illustrate what I consider to be a great danger in the conservation move- ment. It is difficult enough to convince the lay public and planning authorities of the needs of wildlife even when it is there—they often seem to regard conservationists as cranks— but how much more difficult is it when the birds or what-have-you are not there. We must beware of this attitude which says, "Our reserve is better than yours because we have the Lesser Spotted Mugwump." So what? The others have probably got the Greater Blue-bellied Nit, and so the ding-dong battle goes on.