Autumnal tranquility in Cockaynes Reserve

It was unremittingly dull but unnaturally mild and almost eerily still for my walk at Cockaynes Reserve last week. Barely a sound to break the calm, except when a wisp of breeze dared breathe and every dry-leaf-crackle gently fractured the silence.

That is apart from the bird life: mournful autumnal Robin songs washed through the trees, while half-a-dozen Redpolls trilled over, a band of Siskins bounced through the Alder tops, two Kingfishers flashed over the heath, their calls of an intensity matched only by the declamatory Cetti’s Warbler.

Despite widespread forecasts of a fiery autumn, here it was subtle, the shades of  English pastoral pastel…

… but fruits aplenty, haws waiting for the northern thrushes, Stinking Iris at ground level and Sweet Chestnut husks splitting on the tree.

The fungal season is just starting, but the portents are good, with Fly Agarics nestling at the base of Silver Birches, clumps of Sulphur Tuft, and small orange caps (Rickenella fibula) and discs (Neottiella rutilans) exuding from the heathy carpets of mosses and lichens, the latter including the dog-lichen Peltigera didactyla.

And just a few flowering plants: the last few Common Centaury and Stork’s-bill, Trailing St John’s Wort and superficially similar but much more numerous Least Yellow-sorrel.

Insects and other invertebrates were few, but included a Parent Bug, Velvet Mites and a few crane-flies and hoverflies:

And then of course the galls, on the Oaks in particular, such as these Marble Galls:

Over the years I have examined innumerable Oak leaves at this time of year. There are three common Neuroterus gall-wasp spangle galls: Common Spangle, Silk Button and Smooth Spangle, listed in order of their typical frequency. But this year, here as elsewhere, Smooth Spangles have been as easy to find as Silk Buttons.

And while I have often found two of the three species, in all combinations, on a single leaf, apart from one at the Ingrebourne Marshes in 2021, I have never found all three species together side-by-side. But at Cockaynes last week in just a few minutes on two separate trees I scored hat-tricks. Two leaves showed spatial separation within the leaf, while on the others there was more intermingling.

Endlessly engaging, I have long had a fascination for these galls. Indeed I first wrote about them for the Colchester Natural History Society as long ago as 1986 during my first spell of living in Wivenhoe. Back then I found no hat-trick leaves at all, and my annual observations since then have done no more than reinforced my perception of this pattern. No answers to the question ‘why?’. But what would life be without a little mystery?!