A PRELIMINARY SURVEY OF THE COLEOPTERA REDGRAVE A N D LOPHAM FENS R.
D.
OF
POPE
(British Museum [Natural History], London) and Lopham Fens have been acquired by the Suffolk Naturalists' Trust and are scheduled as a Site of Special Scientific Interest. It is intended that the area be managed by the Trust in such a way as to preserve the wild fauna and flora that it contains. In order to carry out this plan, many preliminary surveys of the area will have to be made and in May 1965, the British Museum (Natural History) was asked by the Lopham-Redgrave Fen Advisory Committee to investigate the beetle fauna. REDGRAVE
In view of the limitations imposed by justifiable resources, the survey was planned to cover one fĂźll season's collecting and part of another. A series of twelve, short visits was made, most of them comprising an hour or two's work on the day of arrival, two fĂźll day's collecting and a brief look round on the day of departure. The visits were regularly spaced from July to September, 1965, and from April to September, 1966. T h e number of collectors on each trip varied from three to four. T o work as many different types of habitat as possible while at the same time obtaining some idea of seasonal variations, certain areas were collected repeatedly, while part of each trip was devoted to covering new ground. In order to make the best use of the time available, as many collecting techniques as possible were used on each trip. Some places were worked with the sweepnet or beating tray, water collecting was by netting or panning. Vegetation around the edges of pools and along the river and drain banks was trodden into the water to discover its contents. Such vegetable debris as was found was either searched on the spot or samples were taken away for Berlese funnel extraction at the museum. Loose bark and dead timber were carefully examined, some reed-splitting tried and the few dung samples discovered were dissected in the field. Although some rabbit corpses and a few dead birds yielded their quota of beetles, by far the best results in this direction were obtained from the deliberate use of carrionbaited traps. Almost all the collecting was done in daylight, but one attempt at dusk produced some interesting results, including the only recorded buprestid. It was decided that an isolated list of captures would be of comparatively little interest. A faunal list is given below, but in addition the results are compared with those available for other similar areas and with the relevant county lists and records.