The present publication includes a checklist and accounts of all 35 species of Odonata that have occurred in the two vice-counties with accompanying maps, flight-time histograms and photographs, as well as their breeding and Red List status, and some of the best locations to visit. The maps show the distribution of species up to the end of 2014, with notes of additional significant sightings that occurred in 2015 in the text. The book includes all of Vice-Counties 33 and 34, covering Gloucestershire as far north as Tewkesbury area, and South Gloucestershire as far south as some areas of Bristol.
Three species have been re-recorded since publication of Distribution of Dragonflies in Gloucestershire in 1991. The species new to the county since 1991 are Yellow-winged Darter in 1995, Lesser Emperor in 1996, Variable Damselfly in 1998 (although an old record exists in South Gloucestershire VC34; this area not being covered by the 1991 Atlas), Scarce Chaser in 2004, Southern Emerald Damselfly in 2006, Small Red-eyed Damselfly in 2006, Small Red Damselfly in 2013, and Vagrant Emperor in 2013.