26 The Renault car was thought to be a write-off, but luckily the driver was not hurt. However, it is as well to remember to slow down when you see the deer (wild animal) warning signs on fast roads like the A12 at Brentwood. Let us hope the next record will be a happier one. ADRIAN VERNON FIELD STUDIES COUNCIL PUBLICATIONS Available from Central Services, FSC, Preston Montford, Montford Bridge, Shropshire, SY4 1HW. All prices include P&P. B/W illustrations. Ozone and the Greenhouse Effect: a practical GCSE coursework guide by Stephen Tilling, price £2.95. 32pp. 1990: Acid Rain: a practical GCSE coursework guide by Stephen Tilling, Andy Nisbet and Keith Chell, price £2.95. 36 pp. 1990; Soil Types: a field identification guide by Stephen Trudgill, price £2.95. 26pp. 1989. An AIDGAP guide; Keys to the families of British Spiders by L. M. Jones-Walters, price £3.75. 78 pp. 1989. An AIDGAP Guide. All highly recommended. Tracking Leaf Moths The discovery last year of a tiny foreign moth which is spreading through Esse;; is providing scientists with an opportunity to see what might occur if genetically modified insects were released to control pests or weeds. The