As is by now traditional, we organised a WildEssex walk in high summer around Lower Lodge nature reserve, near Wivenhoe. Lower Lodge is a lovely, flower -rich grassland site, mostly mown on a three- or four-year rotation by Colchester City Council, producing a diversity of habitat structure, from woodland, to dense scrub, to scattered scrub to open grassland. All components have their value, although the open grassland is especially diverse for both insects and flowers.
But we hadn’t planned on a summer like the current one. An unprecedentedly hot, dry summer with three heatwaves and droughts already, and it is only mid-July. So it was with some trepidation we set out onto the site to see what we could find. At least there were plenty of pollen- and nectar-bearing flowers, particularly Wild Carrot, Hogweed, Common Knapweed, Field Scabious, Creeping Thistle and the beautiful bicolored form of Field Bindweed.
From a distance there were a few butterflies flitting around, but I was stopped in my tracks at the very first Carrot umbel: Ectophasia crassipennis! A stunning parasite-fly that lays its eggs on unfortunate shield bugs before the fly larvae devour the bug from the inside. Slowly….
It is a species I know well from the Pyrenees that first reached the UK in 2019; it is now found widely along the south coast, but is only just starting to head our way. So far as I can ascertain there are only a couple of other records from Essex, one at Wrabness in the year of its first arrival and one last year that I found in Beth Chatto Gardens.
We then carried on on the parasite-fly theme, recording two more species, Tachina fera and Eriothrix rufomaculata.
What a great start and although individual numbers of most insect species were not high we kept on finding things of interest until the end of the two hours when the other absolute highlight performed as the very last insect of the walk. This was a Hummingbird Hawkmoth, always good to see and reasonably common this summer. But what was it doing hovering its way through, not over, the grass, avoiding the flowers, completely oblivious to us as it flew between us, and occasionally touching down? And then it twigged, ‘it’ was a ‘she’, she was laying eggs on the Hedge Bedstraw plants growing in the grassy sward. This is not a behaviour I have ever seen before, so our walk ended with me as excited as when we started!
Sadly, unless any larvae develop very quickly such that the next generation is out by early autumn, they are unlikely to survive our winter. But maybe, just maybe, a warm winter could allow it to succeed.
Other moths we saw during the walk were many and varied, from grass moths like Agriphila straminella (all very brown and flittery) to the stunning Brassy Longhorn (a specialist moth dependent upon Field Scabious, seemingly very scarce in Essex) and of course the Six-spot Burnets, resplendent in their black and red livery in the sun, whirring around, occasionally landing to feed, and some new emergers just drying out close to their vacated pupal cases.
Other flies feeding on the umbels included the hoverfly Chrysogaster solstitialis and lots of Flesh-flies, while sitting around on the leaves, either mating or on the lookout for insect prey were Kite-tailed Robberflies, alongside tiny sweat-bees Lasioglossum sp.
Another selection of insects feeding on flowers comprises a parasitic ichneumon wasp (the nemesis of caterpillars), Turnip Sawfly, a Knapweed Bug Oncotylus viridiflavus (for which there are only a couple of records east of Colchester), Hairy Shieldbug, Seven-spotted Ladybird, Thick-thighed Beetle and Hogweed Bonking-beetle. A veritable cornucopia of delights!
So among the insects that leaves just the butterflies. Gatekeepers were the most numerous, with just a few Meadow Browns, good numbers of pristine Painted Ladies, and a very few Small Skipper and Common Blues.
In addition, but not photographed, were Small and Green-veined Whites, single Red Admiral, Brown Argus, Small Heath and a Purple Hairstreak that had a lucky escape from a spider’s web up in an oak canopy. And flying around the fields there were Emperor, Brown Hawker and Common Darter dragonflies, and Willow Emerald and Common Blue Damselflies.
Aside from insects, there was plenty more of interest, including a spider Enoplognatha with its hoverfly prey, abundant Oak Mildew, artichoke and marble galls on Oaks, and a good fruiting of sloes.
And just to finish off, the things we didn’t see as a group, but which I found on my recce a couple of days previously: leaf mines on oak and galls on Wild Rose (we just didn’t have time to hunt them all out on the walk)…
… Box Bug and Cinnabar caterpillars
… Ringlet and Small Copper
… and a hoverfly Xanthogramma pedissequum, known aptly as the Superb Dayglower.
Yes, Lower Lodge performed very well as always, a powerhouse of biodiversity on our doorstep!



















































































































































































































































































































































































































































































































































































