Tag Archives: Blackthorn

Natural History, Nature Reserves

Spring in the Air! Volunteering and Prototyping at Gunnersbury Triangle

First Comma of the year!
First Comma of the year!

Well, it only takes one still, warm sunny day and suddenly it’s SPRING! Sure enough, the frogs had gone crazy down the mangrove swamp, there was a great heap of spawn in the shallow water, and some excited children (and mothers). A pair of Comma butterflies wheeled and scurried about the sky in a long, intense dogfight, their whirling wings making it clear these were rival males of an orange species, if nothing else!

Hairy-Footed Flower Bee (Anthophora plumipes) male
Hairy-Footed Flower Bee (Anthophora plumipes) male

Mike expertly identified the Hairy-Footed Flower Bees around the Alkanets: they came out to warm up in the sun in some numbers. They have never been recorded before here, though we have surely had plenty of them, unrecognized.

Frogspawn in Mangrove Swamp
Frogspawn in Mangrove Swamp
Spring! Broom in bloom
Spring! Broom in bloom

The brilliant yellow of the Broom, and the foamy white of the Blackthorn flowers, announced that spring had sprung in a Botanical way, too.

Blackthorn in Bloom
Blackthorn in Bloom
The completed Hedgehog House prototype
The completed Hedgehog House prototype

The team spent the afternoon designing and making a prototype Hedgehog house out of Correx sheets left over from the Vole Patrol. We worked out a way to make a house from just two sheets, 54 x 120 cm each: basically one big tube folded 4 times to give 4 sides and an overlap flap, and two half as wide, one for the entrance tube, one for the two ends (joined along the ceiling with flaps on each end of the floor). We fixed it together with just 5 cable ties ingeniously stitched through bradawl holes. A challenge was to get the last stitch in, as the box was then fully closed! The trick was to take out the entrance tube and put a hand inside: the cable tie had to be poked out through a hole that of course we could only see from the outside! The result looks enormous and luxurious, so being Londoners of course we made a lot of jokes about Hammersmith Hedgehog Penthouses and luxury granite kitchens, etc etc. Anyway, we hope the hedgehogs will like them.

Nature Reserves

Burning Brash at Ten Acre Wood

London has a chain of not-quite-secret nature reserves stretching down its western side along the line of the Grand Union Canal and the valleys of the River Colne, River Frays, and the Yeading brook all the way to the River Crane, where there are more reserves; they are in the green strip you may briefly glimpse as you leave town on the M4 or M40. Many of them are rather tricky to reach because, almost by definition, the places that haven’t been built over are off the beaten track, round the back of airfields or industrial estates, past the housing estates and into the surprisingly green and quiet areas that have not yet been cut up by HS2 or other developments.

Burning Brash at Ten Acre Wood
Burning Brash at Ten Acre Wood, with a blackthorn in full bloom

A Land-Rover full of London Wildlife Trust volunteers wriggled through the Hillingdon suburbs to Ten Acre Wood and what used to be the Ten Acre Wood Meadows. These have seen little management as agriculture has declined. The Trust’s chainsaw team had cut a fine crop of small trees – blackthorn, hawthorn, even oak, the climax plant in the succession from bare ground to full-blown forest – and left the branches neatly stacked in enormous rows across what should be meadow. The Yeading brook made the ground squelchy; six mallard flew in looking for somewhere suitably wet. Chiffchaffs and a blackcap sang merrily. We started two bonfires, admirably fanned by the cool breeze, and dragged branches on to them for hours until a sandwich and a welcome cup of tea intervened. With a bit more bramble clearance, and preferably some grazing, the meadows will again be a fine place for meadow flowers. Even now, it was amazing to realize that the city was all around, with nothing but greenery and blue sky in sight.

Conservation, Nature Reserves

Midland Hawthorn on Ickenham Marsh

Blackthorn on Ickenham marsh
Blackthorn on Ickenham marsh

On this lovely spring day I drove around the backstreets of Ickenham until I found my way to Austin’s Lane (there’s The Old Fox pub marking its start) and so to Ickenham Marsh nature reserve (London Wildlife Trust). It’s tucked away behind Northolt airfield: the second world war Spitfires have been replaced by transport planes and executive jets, but the result has been to keep development at bay. The marsh is bordered with great drifts of blackthorn, the soft white blossom lovely in the broad hedges. Chiffchaffs were singing all over, and a mistle thrush rasped out its harsh flight call. Even the dunnocks looked splendid, their grey and brown plumage catching the sun as they chased low around the bushes. The breeze brought the occasional whiff of aviation fuel, but still there were some small patches of common orange lichen, Xanthoria parietina, and the grey lichen of bare twigs, Parmelia.

Midland Hawthorn, Crataegus laevigata
Midland Hawthorn, Crataegus laevigata

A complete surprise was the Midland Hawthorn by the Hillingdon Trail which crosses the reserve. The bush is the same size and shape as the common Hawthorn, but the leaves are only very slightly notched rather than deeply divided, and the flowers have two styles, not one (easy to remember as the common Hawthorn is C. monogyna ‘one-female’). An uncommon or perhaps just an easily-overlooked plant, something old and special on the edge of London.

Lesser Celandine on Yeading Brook
Lesser Celandine on Yeading Brook

Also crossing the reserve, roughly northeast-southwest, is the Yeading Brook. I was just taking a photo of the first buttercups of spring, the lesser celandine, which likes wet muddy places, on the steep bank of the brook, when a kingfisher shot down the middle of the little stream, blue and turquoise. I turned to take my photo, and the kingfisher, or its mate, raced back past me again.