Dragonfly and Damselfly monitoring on the Writtle College estate - the first five years
Table 5. Total number of individuals per 100 metres per year for each transect section
C. splendens became more widely distributed and abundant on the College estate during the
monitoring period (Fig. 2; Table 6). The strongholds of this species were alongside the Rivers Can
and Wid (Sections 6. 7 and 8). although expansion in range towards the sections adjacent to Butler's
Brook (Sections 1, 2, 3 and 4) occurred over the five years. However, in these newly colonised
sections, this species was observed in very low abundance. Other species such as Blue-tailed
Damselfly Ischnura elegans have become less common on the estate during this period (Fig. 2).
Fig. 2. Number of C. splendens and /. elegans individuals per visit per year
Table 6. Number of C. splendens individuals per 100 metres per year for each transect section
104
Essex Naturalist (New Series) 19 (2002)