The rather derogatory term “twitching” (see definition in my tongue-in-beak bird glossary) is usually preserved for someone going out of their way to see a rare bird…but those with an interest in seeking out natural wonders may well twitch anything. Yesterday, I took my daily walk partly along the Cambridge to Stives guided busway to “twitch” the bee orchids that are thriving sporadically along the wild margins of the route.
While I was walking back to my turning-home point, I bumped into a group of people who were well aware of the bee orchids, pointed out that there were also some pyramidal orchids around and explained that they were (mostly) amateur botanists out for a day’s botanising (the wildflower equivalent of birding and mothing, I presume).
The plant that had taken their interest at the time I stopped to talk them was a seemingly mundane specimen in the impacted dirt at the edge of the by-way and guided bus cycleway. What made it interesting was that it was a maritime species, a wildflower that should only be seen growing along our coasts. Now, given the number of wading birds that seem to have taken to being landlubbers these last few months in and around our village, it’s perhaps no surprise that a maritime plant species will have taken root, perhaps a seed having hitchhiked among the feathers of one of those coastal waders or been delivered in conjunction with a bird’s inflight fertiliser in the form of avian guano. I think this is the plant, but there were several others around it, so not sure, and no idea of its ID.
Mystery maritime – Is this a coastal plant that has become a landlubber?
TL:DR – One can attract clearwing moths to one’s garden with focused planting or with synthetic pheromones.
There is a beautiful group of moths known as clearwings that at first glance look rather waspish. Rather than having wings covered in scales like all of the other Lepidoptera (which roughly translates as scaly wings, or perhaps more strictly tiled wings), their wings a transparent, but for the supportive struts.
Red-belted Clearwing
These are generally day-flying moths and look like tiny shimmering jewels if you catch sight of one. The males are attracted to sex pheromones exuded by the female. As such, it is possible to draw them to a lure impregnated with the appropriate sex pheromone for each species. The moths that arrive at the lure can then be counted and ticked, perhaps even photographed in the name of (citizen) science.
Currant Clearwing
I purchased a set of pheromone lures from Anglian Lepidopterist Supplies ( a company that does exactly what it says in its name). I had previously used a lure for the Emperor moth with great success regular readers will recall. In the clearwing set there are lures for ten clearwing moth species. I began putting lures out individually on likely days – warm and breezy – back in May, but it is only into June that I’ve had success with the clearwings.
In early June, a Red-belted Clearwing was drawn to the target lure. By mid-June I was trying others and discovered that the lure for a different species, the Large Red-belted Clearwing drew in the smaller cousin – 14 of them, in fact! I put the lure out for the Hornet Moth next, no luck. Then, the Currant Clearwing, success this time. Then I tried the Orange-tipped Clearwing lure, and drew in not the target species but a Yellow-legged Clearwing. Later, I learned from an expert name of Anthony Wren, that those two lures are identical in composition and now I am musing on what that says about the evolutionary history of these two species.
Yellow-legged Clearwing
Clearly, the lures are not 100% on point when it comes to the species they attract. Now, ALS does list non-target species for each of its lures, so it is not entirely surprising. The reason is perhaps to do with the composition of the lures.
Red-tipped Clearwing
As I understand it, the lures each have the primary sex pheromone of the target female, but they also contain a mixture of other modified, volatile fatty acids and so on. This will lead to a degree of overlap in what the lure attracts because those other chemicals may well be interesting to other species of insect. It may not be about sexual attraction it could simply be that they are attractive or stimulating molecules. There does not seem to be a whole lot of clarity in the overall picture of what does what to each species yet, although there is a huge amount of excellent and ongoing research in this area.
Orange-tailed Clearwing
Orange-tailed Clearwing (Synanthedon andrenaeformis) with its golden hair pencil turned up (2 or 3) at about 10am to the SYN lure in the garden on 16th June 2021.
TL:DR – Testing the Topaz AI software to sharpen, remove motion blur and denoise an otherwise unusable photo of a Peregrine Falcon.
I’m just giving Topaz Sharpen AI and Denoise a try-before-you-buy. I had some hastily grabbed photos of the Ely Peregrines, but the best of the bunch had quite a lot of motion blur and was rather noisy because of high-ish ISO and exposure compensation to get the underside markings of the bird against a bright blue sky as it flew overhead.
So, here’s the basic photo converted from camera RAW and close-cropped to a square to ultimately upload to the Sciencebase Instagram. It looks very grainy/noisy and the motion blur and shoddy focusing look irretrievable, to be honest…
I told Topaz that the photo is suffering from serious motion blur and is “very blurry” and let it choose the basic settings. It took several minutes to process the image but the output is quite astonishing…you have to admit!
Still noisy, but then I hadn’t asked it to clean up the grain, I used the separate Denoise AI software to do that, again with quite astonishing results just setting it to “standard” and letting it do its job. Denoising was very quick…
The final step was to go back to my usual photo editing package PaintShopPro to develop the image as I normally would and to add my logo…
That’s a pretty good result considering how shockingly bad the original unprocessed image was and perfectly acceptable for Instagram and other social media, I’d say, although probably not going to be good enough for National Geographic in any way, shape, or form.
The Topaz Labs software – Denoise, Sharpen, and others – can be found here.
I have mentioned the biodiversity issues on one of our local fenland drains, known as the Cottenham Lode. Over the last couple of years several of us have seen Brassy Longhorn moths feeding on the Field Scabious that grows on the lode bank at the dogleg near the footbridge into the woodland at Rampton. There has been a problem with the time of the mowing of the Lode bank, which is done each year by the Environment Agency for flood risk reduction an important maintenance job, obviously.
Brassy Longhorn feeding on Field Scabious on the Cottenham Lode
The mowing is usually done in two stages a strip towards the top of the bank is mown fairly early in the summer and the lower strip and the upper strip are then mown completely towards the end of July. Unfortunately, that full cut takes with it all the field scabious flowers, which are still blooming and with it the insect life that had until that point been thriving on the flowers. It is a crying shame one might say, especially in an age when conservation and biodiversity are high on the agenda.
I have great news to report. I have been in discussions with the Environment Agency who have now agreed to defer the first cut of the lode bank until no earlier than the week commencing 16th August this year and a similar date for future years. This means that the second, full, which takes in all of the lower part where the field scabious grow will be later still.
This will hopefully give the insect life and the wildflowers a better chance before the blades fall on them each year. So thank you to Alex Malcolm and Neil Stuttle at the EA for listening to my argument and finding a solution.
Earlier in the year, I bought myself a summer of moths – a pack of pheromone lures with which to entice clearwing moths into the garden, with a view to grabbing a quick photo opportunity and letting them on their way to find a mate etc.
Regular readers will recall I have mentioned pheromone lures before in the context of the Emperor moth. The clearwings are a very different group and I’ve not had time to find out much detail about the chemistry of their pheromone attactants. Regardless, I have been putting out a lure, known as “myo” for the Red-belted Clearwing (,em>Synanthedon myopaeformis).
Usually, I hang the lure in the back garden and have had no luck, but on a whim, today I put it in the front garden and within about ten minutes, a RbCw turned up. The specimen was a lot smaller than I was anticipating, but checking in my “Collins”, I see that it is a rather small moth, with a wingspan of 19-24 mm. I’d say this one was on the lower end of that size scale. Beautiful creature, obviously belted and see-through wings. If you didn’t know, you might guess at it being some kind of wasp-type insect. But, definitely no sting in the tail of this one.
The species flies June to August but is rarely seen except by those with a pheromone lure for citizen science purposes. The larvae live under the bark of old apple, and other fruit trees such as pear and almond. Got the best snaps I could of this rather skittish specimen so I could let him back into the wild sooner, rather than later.
This tiny little micro moth known as Aethes tesserana is a mere 5 millimetres long. It was drawn to a 40W actinic lamp in our garden on Sunday evening (2021-06-06). It was a still and balmy evening, I seem to remember.
Incidentally, not all the micro moths are tiny, some of them are bigger than the macro moths, some of them are huge. The distinction between micro and macro is now understood to be about evolutionary history rather than size. All the butterflies sit in the micro moth grouping, being just a specific group within the moth family.
A. tesserana does have a trivial, vernacular name, it’s sometimes called the Downland Conch, and is listed as such on iRecord. However, these vernacular names are rarely official when it comes to the micro moths and indeed are frowned upon in many cases by moth-ers and lepidopterists because they are inconsistent and the scientific binomials are preferred to avoid ambiguity.
Meanwhile, some long-form reading matter for you (a book, in other words) – Much Ado About Mothing.
For a lot of people, moths are tiny, fluttery creatures that turn to dust if you try to catch them and whose caterpillars can chew through their vegetable patch, their prize perennials, and even their carpets and clothes. Now, there are pest species, admittedly, and these can to some extent be controlled in appropriate conditions. However, for those who have been initiated into the wonders of the Lepidoptera, the 180,000 different species around the world are a natural wonder to behold.
Some of the Sciencebase mothing kit
For those of us who do get hooked on moths – we call ourselves “moth-ers” by the way – it can become an obsession that persists from the first very first lep sighting. For those who insist that moths and butterflies are somehow different, and that butterflies are far more beautiful and far more worthy of our attention, it’s worth pointing out that all butterflies are just a single group within the Lepidoptera.
Emperor
The other groups include the noctuids (also known as owlets), the geometers (their caterpillars, larvae, measure the earth, they’re the inchworms), the sphinx moths (also known in the British Isles as the hawk-moths), and several others. Butterflies are merely one such group among the moths. Moreover, they’re actually just one group within the so-called “micro moths” (nothing to do with size, everything to do with their place on the evolutionary tree).
Gypsy Moth
It’s complicated, and all moth-ers come to the obsession through a different route. In his wonderful new book, Much Ado About Mothing, James Lowen, challenges all those dusty preconceptions about moths. He takes us on a lavish and circuitous route around the UK searching for the rarest and most intriguing of our scaly-winged insects. Incidentally, of the 180000 worldwide species a mere 2500 or so are found in the UK, some of them migrants and rare visitors.
Clifden Nonpareil
With Lowen, we clamber up mountains, we wade through marshes, and we look for what lurks in the wood and on the trees in ancient woodland. What we find is an incredibly diverse group of animals, all of them sharing common features but each very different from the next. Lowen shows us just what most people seem to miss about moths – their natural beauty.
Gold Spot
Mothing, as a hobby, is on the rise. It has often been a parallel hobby for birders, one that can be done with lures and lighttrap or even just a white sheet and a bright torch, in one’s own back garden or a local patch of countryside, and…even right in the centre of the city! Your mileage may vary on what you find, but each mothing experience brings new delights, and a new hope that the next lep to turn up will be one of the rarest of the rare or perhaps even one once thought extinct that turns out to be very much extant.
Cinnabar
If you are not yet convinced, then delve into Lowen’s book, it will astonish and intrigue even the hardiest of mottephobe, I am sure. And, remember butterflies are just one group within the moth family…and who doesn’t like butterflies?
Pale Tussock
If you love or loathe lepidoptera buy this book, Lowen’s wonderful enthusiasm will give you a mental boost either way and if you were indifferent to the scaly-winged insects, it might even let an interest pupate and to take to the air.
Swift boxes designed and built by Dick Newell have now been installed by firefighters from Cottenham Fire Station on the new Village Hall and the sports pavilion with plans to install additional units.
Swift in flight, Apus apusDick Newell with one of the multistorey Swift boxes now installed in Cottenham’s sports pavilion
The wooden boxes blend in well with the buildings offering executive homes for our summer visitors and augmenting the swift bricks that already form part of the fabric of the new Village Hall. The boxes have a smooth slot through which these slick and speedy birds can fly to build their nests.
Retained firefighters from Cottenham Community Fire a Rescue Station
Within each box is a ‘nest form’, Newell told me. Essentially the nest form is a square of plywood with a hole cut in it. He and his colleagues tested various designs, such as smooth cup-shaped nest forms against this simpler approach and found that the swifts showed no preference, so new boxes are built with the simpler design.
The large box installed in the gable end above the pavilion clock also has an electronic that plays back a recording of swifts calling in flight to encourage new arrivals to approach the boxes and ultimately build their nests within. Newell told me that the birds usually use spit and feathers to construct their nests and once they’ve raised chicks and flown back to Africa for the winter, the remains of the nest will be degraded by insects and mould.
Unfortunately, he adds in recent years, swifts have been found to use fragments of plastic they catch or collect and these fragments simply accumulate in the nest box as with no way for them to be broken down naturally before the next year’s summer visitors arrive.
The first swifts of 2021 arrived on the Cottenham fen edge patch in the latter half of April and more turned up over subsequent weeks with some locals reporting that the birds have taken up residence in nest boxes installed on their houses. It remains to be seen whether the visitors are inclined to nest in the new boxes this year, but the village has now offered new housing for the birds. It is their turn to take action.
UPDATE: 14 July 2021 – Simon Gillings spotted two cranes briefly at the Smithy Fen flooded field. Others have noted sandpipers and Ringed Plover raising chicks.
When it comes to local places to spot new and interesting birds, the first place you might try in this neck of the woods (as it were) are the various nature reserves we have within a few clicks. There are the RSPB reserves – Ouse Fen, Berry Fen, Fen Drayton, Fowlmere, Ouse Washes most of which I’ve mentioned on this site at least once in the last few years. Then there are the National Trust places like Anglesey Abbey and Wimpole Hall as well the likes of Wicken, Tubney, and Burwell Fen. Further afield there’s the Wetland Trust site at Welney and other fairly nearby RSPB reserves such as Lakenheath.
Turtle doves have arrived in Cottenham again for 2021
But, we also have a couple of very interesting birding sites in our village of Cottenham – Long Drove and Smithy Fen.
Long Drove stretches from the entrance at Beach Road all the way past the various farms, the back of the landfill site, several ponds, and on to the gravel works and then the Cambridge Gun Club. The drove itself is a public highway and most of those various spots are only observable from the road itself, nevertheless, there is often something to see in the fields, in the skies, and babbling about on the ponds.
Turnstone
Watch out for Common Buzzards and other raptors, including Kestrel and even Peregrine, small birds such as Linnets and Goldfinch, and plenty of gulls. For the gull aficionado (never seagull, by the way) there are often great flocks of mixed birds: Black-headed Gulls, Lesser Black-backed Gulls, Great Black-backed Gulls, Herring Gulls, Common Gulls (which are quite rare). Most winters and into the spring there are often some slightly less common gulls, such as Iceland, Caspian, and Yellow-legged gulls, which might even draw birders from wider afield. A couple of winters back there was a Hooded Crow (common in Scotland, but a rarity this far south).
Sanderling
Turning to Smithy Fen, however, the recent flooding of the paddocks at the bridge and the farmland adjacent to the Lode but beyond the travellers’ site has turned up a veritable mega list for local birdwatchers. None of the sightings are strictly ‘megas’, which is usually a term reserved for an incredibly rare bird. Nevertheless, several locals who send me sightings for my newsletter report have put together a list of birds one might not usually expect to see, but for those flooded paddocks and fields.
Avocet
Among them: Yellow Wagtail, Grey Wagtail, White Wagtail (European version of the British Pied Wagtail), Water Pipit, Meadow Pipit, Sedge Warbler, Stonechat, Wheatear, Wigeon, Shelduck, Garganey, Green Sandpiper, Golden Plover, Snipe, Jack Snipe, Dunlin, Redshank, Greenshank, Wood Sandpiper, Whimbrel, Bar-tailed Godwit, Black-tailed Godwit, Ringed Plover, Little Ringed Plover, Sanderling, Avocet, Ruff, and Common Tern. In the Fen Reeves Wood a Nightingale was reportedly heard recently, but it apparently stayed only a day or two. And, another for the gull aficionados, Kumlein’s Gull, which brought in quite a few birders from off the patch to see this rarity.
UPDATE: 2021-05-15 – Two Temminck’s Stints on the flooded field seen by local birder Brendan today. RSPB website describes this as a formerly breeding species with just 100 or so seen each year on migratory passage.
UPDATE: 2021-05-17 – Glossy Ibis has now been seen on that flooded field.
UPDATE: 20121-05-20 – Little Stint joins the one remaining Temminck’s
Yet to be noted are Common Sandpiper, Curlew, Turnstone, Spotted Redshank, Little Stint, Curlew Sandpiper…and then the rarities.
A Nuthatch (possibly the first in modern birding memory) turned up for a few days in the trees around All Saints Church and the gardens thereabouts. A couple of Turtle Doves are back as are Whitethroats, and Lesser Whitethroats along Church Lane.
Nuthatch – a first for Cottenham in modern birding memory
Speaking of Turtle Doves…
A community conservation officer for the Wildlife Trust for Cambridgeshire recently set-up a small project, following guidance from the RSPB Operation Turtle Dove project to provide supplementary feeding for Turtle Doves in South Cambridgeshire.
He contacted me in December 2020 having got wind of the half a dozen or so turtle doves we’d had in Cottenham in the summer.
Anyway, he was hoping to speak to local landowners on the patches where TDs had been seen, so I spoke to a couple of those I know. And, one of them was happy to discuss further. He met up a few weeks ago and seed has been scattered at the margin of the field and extra bags left with local residents to dispense. The idea as I understand it is actually to encourage pigeons to feed in places where TDs have been sighted and so give the TDs the confidence to feed there too and hopefully then to feel safe and so breed.
One TD was heard and seen in our village two weeks ago, a second one has joined it and both were seen feeding on the margin. I saw them on the wires today but they flew off towards the church after I’d done the initial photoshoot before I got closeups. This shot was taken from about 200 metres away.
Incidentally, if you’re a local and would like to be in on the local sightings as they happen I have a Google Group – Wild Fen Edge – which might be of interest, drop me a line on the sciencebase email address (db@) and we can discuss getting you in the Group.
I’m fairly sure I’d heard this relatively rare bird at RSPB Fowlmere several years ago but as a very, very amateur birder, I’d not seen one and certainly not seen one calling until this week. We took a trip to RSPB Titchwell on 2nd May 2021 and could hear one in the reed bed adjacent to the main footpath from the visitor centre, but didn’t catch a glimpse of the bird. A second visit in the week (5th May) and we could definitely hear the insect-like call of the bird and finally pinned it down to a patch of gorse and hawthorn not far from Patsy’s reedbed.
The Common Grasshopper Warbler is one of the grass warblers. (See What’s a Warbler, Anyway?). Given the name, one might assume that this bird dines on grasshoppers. But, that’s not the allusion of its name. Far from it. Rather the bird is so-called because its call is a constant monotonous trilling that sounds very much like the sound of a grasshopper. Here, have a listen to hear what I mean
The bird finds a safe perch, opens its bill and lets rip with its tuneless but rather delightful call. It’s quite difficult to pinpoint from exactly where the sound emanates, as is often the case with high-pitched bird calls. It’s almost as if the bird has some kind of ventriloquial skill. Nevertheless, we were lucky today and caught sight of it following an outburst as it weaved its way through spiny bushes to find its next perch.
There an estimated 16000 pairs in The British Isles and the bird is in the conservation red list as endangered. For comparison, there are 260,000 Sedge Warbler “territories”. The species can be seen across Europe from the west to Russia and Ukraine. It spends the northern winter in West Africa. The Locustella of the scientific name is the genus of which this species is the “type” naevia “translates” as spotted.
