THE ESSEX NATURALIST Journal of the ESSEX FIELD CLUB No 13 (New series) for the year 1995/96 Edited by Peter R Harvey and Colin W Plant ISSN 0071-1489 World List abbreviation: Essex Nat. Published December 1996 Copyright © Essex Field Club 1996 Information published in this journal may be freely quoted provided that full acknowledgement is made in the normal manner to both author and journal. Printed by Cravitz Printing Co. Ltd. 1 Tower Hill, Brentwood, Essex CM14 4TA.