Twenty species of Dragonfly and Damselfly have been recordred at Chew. The lake doesn't support any real specialities, and even one or two species that might be expected to occur (both resident and migrant species) are missing from the list.  It seems that the next addition could just as likely be a continental species as one which has wandered a few miles from the Mendips or Somerset levels. In the third column, B indicates that the species breeds every year, and b indicates irregular or historic breeding. Calopteryx virgo Beautiful Demoiselle Odd individuals here and there - probably breeds in nearby streams Calopteryx splendens Banded Demoiselle Few records Lestes sponsa Emerald Damselfly B Common Platycnemis pennipes White-legged Damselfly (b) No recent records Phyrrosoma nymphula Large Red Damselfly B Surprisingly scarce - seems to be quite localised Erythromma najas Red-eyed Damselfly (b) Formerly found at Hollow Brook, but no recent records Coenagrion puella Azure Damselfly B Localised and tricky to find amongst the commoner cyathigerum. Enallagma cyathigerum Common Blue Damselfly B Very common Ischnura elegans Blue-tailed Damselfly B Very common Aeshna mixta Migrant Hawker B Common in August and September Aeshna cyanea Southern Hawker B Fairly common, though less numerous than mixta. Aeshna grandis Brown Hawker ? Few records Anax imperator Emperor B Common - favours sheltered bays and pools Libellula quadrimaculata Four-spotted Chaser b Rare, but bred in the Grebe Trail pond following an influx in 2000 Libellula fulva Scarce Chaser One record Libellula depressa Broad-bodied Chaser B A few recorded every now and then, but never common Orthetrum cancellatum Black-tailed Skimmer B Common on Herriott's and Heron's Green Pools Sympetrum striolatum Common Darter B Common Sympetrum flaveolum Yellow-winged Darter One in August 94, then seven together in the 95 influx Sympetrum sanguineum Ruddy Darter B Very common - thousands on the wing during peak emergence