A beautiful shiny Tortricid micro-moth on Hogweed
All posts by Ian Alexander
Aston rowant Flowery meadows
Well, this strange year – a cold dry April when the bees could hardly feed for lack of pollen and nectar; the wettest May anyone can remember; and now a June so late that cherries, raspberries and redcurrants are ripening all together. In some recent years, the end of June would have been too late for many flowers, specially on Aston Rowant’s steep, free-draining Chalk Grassland.
But not this year: it’s like Tolkien’s The Shire after Sam Gamgee has returned victorious and sprinkled the magic grains of earth from Galadriel’s Elvish Garden in all his favourite spots, and everything is glorious with colour, buzzing with bumblebees, and glittering with iridescent green Forester Moths, Thick-Kneed Flower Beetles, and astonishingly shiny Hawkweed Leaf Beetles.
This curious little flower in the Broomrape family, Yellow Rattle, may seem to be just an oddly-shaped herb; but it’s critically important to the flowery meadow ecosystem. It doesn’t have much in the way of green leaves, as it’s a parasite: its roots attach to nearby grasses, extracting the food it needs to live, and in the process weakening the grasses all around it. Result? Tall tough grasses that would otherwise crowd out and overwhelm their attractively coloured neighbours are suppressed, and a wealth of insect-pollinated flowers can, well, flourish. That doesn’t mean the area can just be left to look after itself: Hawthorn and other shrubs would quickly take over and turn the place into forest, so carefully-planned grazing is necessary to keep the land at the meadow stage. It’s called Rattle, by the way, because the ripe seeds dry out and rattle inside the leafy fruit capsules when the plant is shaken.
This small flower was once common in meadows, indeed its name tells its story: it was found wherever milk cattle grazed, in all Britain’s meadows. Now in lowland Britain at least, it’s a rare and special sight, and we feel excited and happy to see it: such is the scale of the catastrophe that has overtaken our countryside. Basically, the flowers are almost all gone; so are the insects; and the birds are fast following them. A place like Aston Rowant is indeed special: its warm, south-facing chalk slopes really were always a wonderful place for flowers like the Chiltern Gentian and butterflies like the Adonis Blue, and happily it still is; but it’s now special just for being what our grandparents would have seen as ordinary: it’s full of what they knew as common wild flowers “of wayside and woodland”.
There weren’t many butterflies about – Meadow Browns, Common Blues, a single Marbled White very handsome with its dancing flight, a good number of Small Heaths up on the hilltop, a Red Admiral. It looks as if the difficult spring has meant low butterfly numbers this year.
My 2014 blog on Aston Rowant, with a different selection of species (and some trenchant thoughts): http://www.obsessedbynature.com/blog/2014/06/18/aston-rowant-beautiful-brutalized/
Handsome Bugs! June in Wraysbury
As well as these elegant and colourful insects, there were Red Admirals and Meadow Browns flying today, but overall very few butterflies.
Strawberry Moon over Chiswick
Beech in leaf and fruit, Gunnersbury Park
Onlooker
This pair of Azure Damselflies formed the “wheel” or “heart”, part of the complex mating behaviour of the Odonata, on a reed in the Gunnersbury Triangle nature reserve pond. As you can see, the colourful male (with the bright blue “tail”) uses his claspers to grasp the female behind the head so he obviously can’t use his tail end to fertilise her at the same time. He therefore transfers the packet of sperm, the spermatophore, to the underside of his abdomen. She uses her tail to pick up the sperm packet from there. So now you know.
Meanwhile, another male of the same species has noticed the female, and is hovering close in the vain hope of getting a chance to mate with her. Of course he looks as if he’s a voyeur, there to enjoy the spectacle; but from an evolutionary point of view, his “selfish genes” can’t be anything but “disappointed” at the fact that another male has got there first.
Bluetail damselfly in Chiswick Business Park
Large Red Damselflies in Gunnersbury triangle
Suddenly, after a freezing but dry April and a warmer but moist (April Showers) May, it’s June and Summer. The hazels have rushed into full leaf; the brambles are pushing across the paths at astonishing speed; Azure Damselflies have all hatched at once and are sunning themselves near the pond; and pairs of Large Red Damselflies are urgently flying about, all 8 wings in harmony, in their complex mating system, to lay eggs rapidly on pond plants before it all dries up. Like their much larger cousins, the Dragonflies, Damselflies are predators, and fiercely competitive for their territory; males chase off not only other males but other insects.
Sumer is icumen in … Cuckoo, Swifts, Butterflies at wraysbury lakes
Cuckoo Flowers … and a singing Cuckoo! A real pleasure after months of lockdown. And a flight of 3 Swifts over the lake:
“Sumer is Icumen In,
Lhude sing Cuccu!”
sang the Middle English poet, centuries ago.
Not pictured are the many Warblers that were singing today – Blackcaps, Chiffchaffs, Garden Warblers, Cetti’s Warblers, and Whitethroats. There weren’t any Sedge Warblers, though, something there always used to be here.
Apart from the attractive butterflies, there were the year’s first Banded Demoiselles, the males with their long transparent wings marked with a large dark blue patch; and near the water, Alder flies with their clear wings with dark veins.
Isn’t that a fine sight for London? Sheep peacefully grazing the steep grassy banks of the reservoir. The water company saves a lot of trouble, noise, fuel, money, and frankly danger trying to mow the slopes: the sheep do the job better. Now if only everything was so well thought out…
A View Rather Wider Than Lockdown: Cherhill Down
Balm to the urban soul … Cherhill Down and monument, taken from the edge of the Iron Age Hill Fort (the White Horse just out of shot, to the right). A view that must stretch for 50 miles. Silence. Space. Sky.