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Appendix 1. GLOSSARY
Acid, acidic
Aeshnid
Soil or water with a low pH (below 7), usually base-poor
Member of the family Aeshnidae (represented in this Atlas by the genera
Aeshna, Anax, Brachytron, Hemianax)
Alkaline Soil or water with a high pH (above 7) and usually base-rich
Alluvium, alluvial Fine sediment deposited by a river or the sea. Alluvial soils are highly fertile
Anal appendages Projections on the terminal abdominal segment of adult dragonflies. In male
Zygoptera, there are two pairs, the superior (upper) and inferior (lower)
appendages. In male Anisoptera, there is a pair of superior appendages, but
only a single inferior appendage (the epiproct). In females, there is a single
pair of anal appendages which may be long (eg aeshnids), short (eg
libellulids) or rudimentary, as in most damselflies. The male uses his anal
appendages to hold the female by the prothorax (Zygoptera), head (most
Anisoptera) or both (Aeshnidae) during mating and in the tandem position
Anisoptera Suborder of Odonata, the 'true dragonflies', containing the larger, more
robust and actively hawking species
Antehumeral stripes A pair of pale stripes on the dorsal surface of the thorax
Basin mire Bog formed in a natural hollow or depression
BDS British Dragonfly Society
Biotope A major land use/vegetation type; 'habitat' (qv) is often used loosely as a
synonym of biotope, but should be used only when referring to habitats of a
named species
Blanket bog or mire Extensive area of bog in areas of high rainfall, found mainly in north and west
Scotland and west Ireland
Bog Acidic wetland on peat
Boreal Northern; in Europe, pertaining to northern Russia and most of Scandinavia
Boreo-alpine Northern, and also occurring in the Alps (and often in other European
mountains)
Boreo-montane Northern, also found in mountains further south
BRC Biological Records Centre, PIE Monks Wood
Breck Inland sandy heathland area of Norfolk and Suffolk (see Figure 14)
Britain England, Scotland, Wales and nearby associated off-shore islands; not
including the Irish Republic or Northern Ireland, or the Channel Islands
Broads, Broadland Area of fens and shallow lakes in Norfolk and Suffolk (see Figure 14), the
lakes originating in medieval peat digging
Burren, The A mainly upland region in north Co Clare, Ireland, characterised by
extensive limestone pavement (see Figure 14)
Calcareous Rich in lime (calcium carbonate)
cf Compare with
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