INTRODUCTION Deer, both wild and park, have been present in Essex for many centuries. According to Fitzstephen's description of London in the twelfth century, fallow and red deer were present in the forest which lay to the north of the city, i. e. what is now Epping Forest (Butler, 1934). There are also eleventh century records of parks, presumably for deer, at Chipping Ongar (Whitelock, 1930) and Rayleigh (Farley, 1783). Although wild deer were once numerous in Essex, they appear to have become extremely scarce by the end of the nineteenth century, being restricted to a few fallow, roe and red deer in Epping Forest and a few red deer near Hatfield Broad Oak. Elsewhere in the county, deer were apparently known only as park animals (Laver, 1898). Information about deer in Essex is conspicuous by its absence; apart from a few brief notes, only one paper about deer (Harting, 1887) having been published in the Essex Naturalist from its inception until 1963. In March 1963, a study was begun of the biology of fallow deer in Epping Forest. Soon it became apparent that, although the deer moved into and out of the Forest, little information was available as to the distance they travelled or even what the distribution was of fallow deer in the surrounding countryside. The Essex Field Club did appoint a Deer Recorder in 1961 with the aim of studying the distribution of deer in the county, but the survey was never completed. In 1964, the Club asked me to organise a survey of the deer of south- west Essex in order to complement the studies being made on the Forest's deer. The inaugural meeting of the Survey was held on 19 January 1965 under the chairmanship of the Club's president, Mr B. T. Ward. Also in 1965, the Essex Naturalists' Trust decided to carry out a survey of the deer in the remainder of the county. The inaugural meeting of this Survey was held on 11 May 1965, the chair being taken by Mr G. A. Pyman, the Trust's chairman. Initially, these two surveys were separate but, because there was a common organiser, they eventually became amalgamated into an Essex Deer Survey. Originally it was hoped that the Survey would be completed within three years but this aim proved too optimistic. Regular recording of deer stopped after five years, in 1969. In 1971, an attempt was made to update the records and a preliminary report was published (Eastcott, 1971). The aim of this publication is to summarize the records obtained by the Essex Deer Survey and to record the marked change in the status of wild deer in Essex that has occurred since Laver's Memoir, The Mammals, Reptiles and Fishes of Essex, was published in 1898. 4