We were pleased to find some very obliging Mayflies on the wing during our morning Macro session at Paxton Pits on Tuesday and even more delighted to witness the Hobbies hunting around the Lakes in the afternoon no doubt catching lots of these mayflies, plus damselflies, and two new species to me Grouse Wing Mystacides longicornis (Caddis Fly) and Cataclysta lemnata, Small China-mark, is a semi-aquatic moth species with larvae that feed on duckweed and other floating plants.
The Cambridge Natural History Society surveyed the plants etc in Grantchester Meadows in 2006 and 2016 so this year is time to repeat the survey. We met on Sunday afternoon at the Cambridge end. The first two meadows are known as the Lamppost Meadows as each has a lamp-post at its centre from 1920-1940 when the meadows used to be flooded with water pumped from the Cam and used for skating. There is an attendant’s hut at the corner of the first field, where the fee of six pence for an evening’s skating was collected. It is managed in a traditional manner - once the meadow has dried out there may be a summer hay cut and it is grazed until the end of the year. No fertilizer or herbicide has been used. The public path alongside these meadows emerges into open meadows stretching to Grantchester, owned by King’s College. The CNHS group were identifying and recording all the plants species including grasses and sedges while I concentrated on the invertebrates, lichens, galls etc. Here a few plus possible IDs sheet. I was intrigued by the spore cups of he nettle Rust, Puccinia urticata,
As I had seen one or two elsewhere, I thought perhaps the Marbled Whites had forsaken Toft Wood Meadow but today there were more than a dozen newly hatched males flying around and nectaring. First recorded in the wood as a newcomer to the area on July 11th 2012, they spread through England as the climate has gone warmer and appear earlier each year. Also lots of Skippers now and other moths and butterflies plus the usual quota of plant bugs and flies (ID sheet included).
