Riverflies: This is a formal survey following specific criteria that allows a "score" derived. This is then a measure of the river's health, which can be used to monitor the river and compare with national standards. MCG volunteers conduct the survey a few times during the year and submit the results. For more information go to           http://riverflies.org/rp-riverfly-monitoring-initiative
Category                        Date	19/5/19	19/8/19	24/4/21	15/4/22	nr	19/9/25	31/7/26
Cased Caddis	0	0	0	0		2	0
Caseless Caddis	4	1	5	10		5	15
Mayfly Ephemeridae	0	0	0	0		0	5
Blue Winged Olive	0	0	0	0		0	0
Flat Bodied Heptageniidae	0	0	0	0		0	0
Olives Baetidae	150	150	100	100		30	30
Stoneflies	0	0	0	0		0	0
Freshwater Shrimp Gammarus	1	1	0	0		20	10
Also Seen                    Date	19/5/19	19/8/19	24/4/21	15/4/22	nr	19/9/25	31/7/26
Water Slater	200	200	150	150		20	15
Leech	150	150	100	50		30	5
Pea Cockle	200	200	200	200		200	100
River Snail (Bithynia tentaculata)	5	10	5	0		5	20
Great Pond Snail	5	10	0	0		0	0