This page contains a Java applet which your browser's security settings might prevent from running automatically, prompting you for permission to run it. You might first also need to install the appropriate Java plug-in for your browser, if this is not already on your system. The applet downloads into its own memory a map image and a file of moth names and distribution data from the website, then constructs and displays the distribution map for each species that you select without any further interaction with the website (so that maps can be displayed very quickly). Recent changes to this page are shown in blue.
The map shows the recording area: the counties of Gloucestershire and South Gloucestershire, together with those parts of Watsonian vice-counties VC33 (East Glos.) and VC34 (West Glos.) which are outside the present administrative counties. The VC boundaries are shown in green, and where different the Glos. and South Glos. boundaries are coloured cyan. Rivers and coastlines are shown in blue, and within the recording area land over 175 metres in altitude is shaded. Ordnance Survey 10Km grid lines and 100Km square letters are shown.
Complete accuracy of the maps can not be guaranteed - with well over 100,000 records in the database some errors and omissions are inevitable. Only records supplied to the Gloucestershire (VC33 & VC34) moth recorder Roger Gaunt have been shown, whilst those supplied only to the Bristol Regional Environmental Records Centre were not available for these maps. Some unconfirmed records and those with insufficient information for mapping purposes have been omitted. For tetrad dots on the area boundary, some records might have come from just outside the intended recording area. For pairs or groups of species not separable with certainty from wing markings, only those records identified to species have been shown but some of these could be erroneous. Records of species forms originally given separate Bradley numbers have been included with the main species entry.
If you have moth records which are not shown on these maps, please send them to Roger Gaunt. A few copies of Roger's 2006 publication "Gloucestershire Moths - A Second Account" are still available from him. This mentions many unmapped records (mostly old ones), and more than 160 unmapped species. Roger can be contacted by email at roger.gaunt@btinternet.com
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To select a species, choose Scientific or Common names, then key in at least 3 characters of the name in the top box and press the [Enter] key. Nomenclature follows the Bradley 2000 checklist except for a few of the subsequent changes and additions. If there is a unique match for the partial name, the appropriate map is displayed. If there are more matches, select one of the matching names from the list which appears. You can use the species scrollbar above the map to move forwards and backwards through mapped species in numerical Bradley number order (not the scientific order in the Bradley checklist). Click on either end of the bar to move forwards or backwards by one species. Alternatively you can use the mouse wheel to scroll between matching named species when the cursor is over the matching name box, or use it to scroll through the full set of species when the cursor is elsewhere over the applet. To see the total number of moth species mapped for a tetrad, move the cursor over that tetrad on the map. The year chart shows relative numbers of records in 3 periods per month (1st - 10th, 11th - 20th, and 21st - end). Solid black bars indicate records of adults or unspecified stage, open grey bars indicate non-adult records: eggs, larvae, pupae, larval or pupal cases, distinctive feeding signs such as leaf mines etc. Red dots across the top edge grid line on the map indicate years for which mappable records are held, starting from 1950. For example, a dot immediately to the right of the vertical 00 grid line represents the year 2000, and one just to the left of the 10 grid line represents 2009. A solid black dot on a map indicates that the species was recorded in that tetrad (2Km x 2Km square) since 2000. A hollow black dot indicates that the most recent record held for the tetrad is pre-2000. You can choose to display just the pre-2000 distribution without post-2000 records. The year chart is based on all records even if only the pre-2000 distribution is displayed. If you want to compare maps for two species (or more), right click on this link and open another window positioned at the applet, then select the next species to display on that window. |
Distribution data © Roger Gaunt. Maps © Guy Meredith. Distribution data to 2009 from RG, July 2010 from GM.