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Roesel's Bush Cricket

Autumn Summary

Well, what a spectacular autumn that was! We haven’t had a proper autumn like that for a long time. For around 5-6 years in a row now we’ve either had strong winds at peak autumn colours or well before the autumn colours even kick in. We can’t complain this year though as it was perfect and for a good few weeks too. Along with the colours it’s been a fantastic year for Fungi too, so I’ve spent some time picking out some of my favourites in the woods at various local locations. My last blog I spoke about a new camera, and no I’ve haven’t won the lottery, but this time around I’ve also replaced my lens too, with a slightly longer ‘400mm’ instead of a 300mm. Despite the fact that it’s a longer focal length, this lens is slightly shorter in length and much lighter in weight, making it overall easier to hand hold, especially given that the built in image stabilisation offers two-three more stops of stabilisation than my older heavier 300mm. Canon has been able todo this thanks to a technique called ‘Diffractive Optic Technology’ which in theory sounds quite simple, as they have split an element in half in such a way that it retains it’s magnification. It’s actually an ingenious idea that’s quite difficult to achieve and even Canon took two attempts to get it performing on the same level as their other super telephoto prime lenses. I won’t bore you with all the details. For me it’s the ultimate trade-off between performance and weight, which has become quite important to me lately as I’ve been suffering with back issues. This design however does come at a cost, not just to the bank account, but also to the ‘bokeh’. Bokeh is a term used to describe everything outside the main focus plane, whether that be the foreground or the background. Where this design compromises a little is when you have certain light conditions in the image where ‘bokeh’ has to render bright objections. It’s most noticeable if there are pure lights or reflections in the background, and instead of getting pure circular ‘bokeh balls’ you will have bokeh balls with other smaller circles inside. If you look at the diagram below, you can see why this happens, as the image to the left is essentially what the light has to pass thru, leaving you with circles in the image. You won’t see this on anything other than those rare circumstances where bokeh balls are pure and honestly, when are they ever pure in nature! Almost never, so it really doesn’t bother me in the slightest. In the diagram below it also shows you two different versions of DO options, the middle one was Canon’s first design, which meant it had an air gap between the lenses. This resulted in loss of contrast, especially noticeable when used with extenders. The third right image is their most recent design which is even more ingenious as it affectively does the same job, but without an official air gap. Clever Canon. So, fingers crossed this lens will serve me well, for now I’m happy.

Here’s a mixture of images taken locally with both the 400 and my 100mm macro, in various places. What amazes me looking back on these images is not that they’re great images, I’m just shocked I managed to get any of them.. as 90% were taken in horrific lighting conditions. So bad that I doubt I would have been able to get any usable shots with my previous setup, so for that I am happy.

Sound Recording

Just to give you an idea of how mild it has been this autumn / winter. I recorded Roesel’s Bush-cricket’s actively moving around and singing, on the 17th of November! Absolutely crazy! I consider Roesel’s to be a true summer species, only really singing on those piping hot summer days. Granted it wasn’t giving it the full effort but I still can’t believe it had enough energy for this amount in November. #Globalwarming

The same day I managed to catch up with what’s most likely to be the same Willow Tit I recorded last year. Sadly this time it was on its own. If you listen towards the end it does some pretty epic alarm call which I have heard them do before but it’s quite a difficult one to hear in the field as it’s not that loud.

I’ll end on a high note as I’ve been meaning to set aside some time to record a Dipper singing for years but given that my local population along the Afon Llwyd is quite an urban river, I always put it off for fear of recording too much human activity. That and the fact that the Afon Llwyd is one of the fastest flowing rivers in Wales, so it’s quite loud. That said, I recorded this guy singing quite close to a waterfall and a busy school, so was surprised I managed as well as this given the circumstances. That morning I lead a walk with In Our Nature CIC and we managed to listen to two Dipper deep in a song battle, which ended up with a chase. It was great for the group to witness this and it was just the kick up the butt I needed to get down there myself with my recording gear. Lesson of the day, don’t let people put you off.


Summer Sound

Lots to share, lots to talk about as always. Blogging for an entire month is proving to be difficult but I’ll give it a shot!! Below I’ll start with a mixture of photographs from various places, but most of which were taken at Tirpentwys Nature Reserve. Not only did I find Bee Orchids in flower this year but there happens to be a spectacular show of Common Spotted, Southern Marsh (Also hybrids between the two), but also hundreds of Pyramidal Orchids! I’ve never seen such a show before, it’s really worth going to see. At the reserve I also had a Hobby, Crossbill, Greenfinch, Redpoll and a good number of migrating Swifts overhead.

Sound Recording

It’s been a good month for sound recording but things are starting to taper off now. Less and less birds in the dawn chorus already, with some mornings just a lone Song Thrush. It’s just that time of year where most of the breeding birds are done, and only the birds pushing into a second or third clutches are continuing to hold territories. It’s not over yet though and I’ll be lapping up as much of it as I can before the autumn arrives!

For our Nightjar though things have just reached peak, with some birds feeding chicks, others still on eggs, some may not have even laid yet! It’s really been an odd year for Nightjar and as a result, I’ve decided this year to concentrate my efforts on a variety of different locations as my local birds have really not had a good year so far this year and they’ve also chosen to nest quite close to a Goshawk nest so I’m avoiding the area for a number of reasons and visiting only at night.

Ok, kicking this off with a Nightjar recording, one of many this season but by far my favourite, as it shows three different calls, starting with a Male alarm call, which is softer than the female, followed by a stellar performance, and ending with his female flying thru his airspace, which resulted in him restarting the song, just so he could end with his spectacular showboating clapping performance. Then you can hear the lower pitched croak from the female, followed by the higher pitched fluty call of the male. It’s a great reference recording of the variety of sounds that Nightjar can produce.

Almost every night now I’m hearing Tawny Owl chicks and couldn’t resist recording them last night.

Grasshopper season is well underway and I look forward to hearing my first electric Roesel’s Bush Crickets. As usual though, I’ve slowed this recording down so the pitch sits in a more audible range as they can be quite difficult to hear.

The Roesel’s Bush Crickets were at the north end of Llandegfedd, and singing also was a stunning Reed Bunting, which didn’t breed there last year so it was nice to hear him back on territory. Onsite also was a good number of Common Sandpiper, which are just finishing up breeding, so are already starting to move south.

As I said, there isn’t much singing now, but Blackcaps seem to be still giving it a good effort.

I was going to devote an entire blog to this Chaffinch song, as the first three phrases appear to be quite unique, at-least they do to my ears. This was from one of my work places in Swansea, where the entire upland population there, seem to emphasise the middle section of the song, with these defined descending notes, that sound very similar to the tune of a Redwing Song. You can hear three different types of phrases in this performance but it’s the first three that I’m referring to. This tune is very similar to that found in other sub-species of Chaffinch from around the world, so it makes me wonder if this phrase goes way back to a time before the species split, as even the endemic species in the canary islands seem to have this. My local population however, doesn’t have this at all, so it makes me wonder how much of a regional accent is at play here.

Here’s a screenshot of the section I’m referring to. The left phrase shows the descending notes that really have emphasis over the rest of the phrase and the second phrase is the more typical monotone middle trill that I’m used to hearing in my local area.

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Nocmig

Nocmig is starting to pick up again! and it kicked off with my first ever Quail! Was a beauty! Since then I’ve had my first Redshank of the post-breeding movement, along with Common Sandpiper, Little Ringed Plover, Oystercatcher and plenty of Moorhen / Coot. Other than that I’ve been getting more and more Swifts moving on ‘morn-mig’ and I intend on upping my game this autumn, as I’ve purchase two second hand ‘Audiomoths’ which are small remote, programable sound devices that are fully waterproof and capable of automaticity recording dusk till dawn, which is perfect for nocturnal migration and due to their small size, it makes them so easy to hide. I also intend on using them to aid my Nightjar research as I can identify new sites by places these devices in key areas, without having to spend multiple nights out in the field to find out for myself. It really increases my chances as you can’t be everywhere at the same time.

Before the Rain

Spring might have been a wet one, but it’s been great so far this summer for bugs. I usually turn my attention to bugs this time of year as some species have a small window of opportunity before they all disappear again till next year. If you like Grasshoppers and Crickets, it’s worth visiting the north side of Llandegfedd as the meadows are alive with Roesel’s, Dark, Oak & Speckled Bush-crickets, Green, Meadow, Field and Mottled Grasshoppers, Long & Short-winged Coneheads and even Ground Hoppers with more to discover I’m sure.
As you know I like to record the sounds of nature, but as many people cannot hear some species of Grasshopper as they’re too high pitched, I’ve started a project that aims to record as many different species of Grasshopper / Cricket as possible and to slow those recordings down so that you can listen to the finer detail of each and every stroke of the wing cases. It’s not for everyone, but i find stuff like this fascinating as it reveals frequencies that you wouldn’t otherwise hear. Listen back to these insects in slow-motion helps you enter their world for a moment and also highlights how important it is for us to start consider the environmental impact our noise pollution has on species that are dependant on sound in order to reproduce.

I tend not to go anywhere simply for the walk these days, partly because I can’t walk far at the moment as I have gall-stones that are playing havoc, but also because I only walk 2 minutes before spotting something interesting to photograph, record or just appreciate. It doesn’t do anything for my fitness levels this way but I’ve made so much luck this way, slowly walking through the landscape, trying to appreciate everything that I see. If you do this, you’ll be rewarded more and more, and this was evident when I was accompanied by a Stoat that was quite shy, but I would have easily missed it if I was walking with the intent to walk. If you want to see things, you need to slow right down.

Pontypool Uplands and Cefn Ila

Yesterday's upland birding session with Craig Constance brought about some nice migrants passing thru, starting off the day with a Juvi Merlin hunting over the moorland above the British, later picked up again as it flew over our parked car and flushed a flock of starlings off the road side! It continued to mob a Red Kite while heading south to the next mountain. Nothing great to show you photograph wise, only this very distance shot of it heading off in the distance. We also noted 2 Spotted Flycatcher, 1 Yellow Wagtail, 2 Redstart, 2 Wheatear and plenty of resident birds like Green Woodpecker, Buzzard, Kestrel (3), Raven and plenty of Stonechat fledglings. It's starting to get a little colder on the mountain now but still plenty of insect life and this Devils Coach Horse Beetle put on a good show walking across our path. 

I visited Cefn Ila today also in search the Wasp Spider, previously introduced by local spider expert Mike Kilner. I was shocked however upon visiting to find that most of the pristine Wasp Spider habitat has since been lost and overshadowed by newly planted Trees and shrub. The site is run by the Woodland trust who've done a marvellous Job at planting a great variety of broad-leaf trees. No-doubt a wonderful woodland to come! But a shame to lose a fantastic spot for such an iconic species of Spider. I did however find plenty of the Spiders food with lots of Grasshoppers and Roesel's Bush Crickets (My favourite british cricket). Also at Cefn Ila were lots of Spotted Flycatchers near the Bee Hives / Orchard. 

Cricket & Grasshopper Sound

I've been looking forward to recording some Cricket / Grasshoppers again this year and I finally hit jackpot with todays low wind (but lack of sun). It was just about warm enough for the Grasshoppers to be singing. I had trouble uploading the Roesel's Bush Cricket to Soundcloud because no matter what format, frame rate / bit rate I upload it in, Soundcloud kills the quality by compressing the file which looses definition in the most vital frequency, and that just so happens to be the frequency that Roesel's sits in, right at the top around 20,000hz. This is also the reason why many people can't hear a Roesel's, because they've lost that frequency in adulthood (nice way of saying you're getting old). I'm lucky to still have these frequencies and I hope that I keep hold of them for as long as I can because they are so rich and much is to be learned about the sounds of nature. To combat this hearing problem, I've slowed down the recordings straight after the original so you can hear how complex and fast it is, even ten times slower than the original recording. The last part of the recording below is (I think) a Meadow Grasshopper, which slowed down actually reveals the individual scrapes that actually produces the overall tone of the song. It's even more amazing when you hear it in slo-mo! 

Here is the recording of the Roesel's untouched. As you can hear (or not).. the quality has been lost to compression. 

Cefn Ila First Impressions (Wasp Spider!)

I've been meaning to check this location out for a while and who better to do it with than Mike Kilner (Local Spider Expert) and volunteer ranger for Cefn IlA. Species to watch out for on the trip were the very illusive Wasp Spider of which only 1 has been sighted this year by none other than Mike himself. 

First impressions of the reserve were brilliant! Their were plenty of Roesel's Bush Crickets amongst Long-winged Coneheads and Dark Bush Crickets so it instantly had my approval but the cackling of a Green Woodpecker and a distant Kestrel were all very inviting. The sheer variety of Tree's there is pretty incredible and with that, I intend on visited again throughout the winter. 

Once upon the right habitat, it didn't actually take us long to find a Wasp Spider! I spotted the first one and in discussed at it being so easy, Mike found a second shortly after. I also got to hold my first ever Slow Worm! I've been meaning to photograph them for a while now so this was a real treat. 


Llandegfedd Cricket Recordings

Early morning at Llandegfedd and it truly felt like spring again! Dawn Chorus was beautiful, albeit filled with mainly Robin's and Wrens but a surprised Chiffchaff also sang for a while which really made me feel good! 

Once the morning dew burnt off and my feet dried out, the Crickets weren't far behind on the chorus. Though, I didn't have it all that easy today as the water pump was on all day which made it really hard to get the 20000hz Roesel's Bush Cricket quite the way I wanted to. 

Lots of pictures today but also a small treat for you in the form a recordings! 
If you can hear them of course.. because I learned something new today, and that is, the Roesel's Bush Cricket produces frequencies well into the 20000hz range which most people cannot even hear. SO! For you, I've slowed some of the recordings down for you which brought even more coolness out of the recordings as you can actually hear the individual scrapes of the hind legs of the cricket.- Especially on the Long-winged Conehead. Enjoy

Todays outing was all about getting recordings of the iconic Roesel's Bush Cricket. Something I've been meaning to do for a while. I was slightly unlucky that the pumping station was on at Llandegfedd meaning my typical hotspot was painted with the washing sound of water in the background which made it extremely hard to get a clear recording of the crickets 20000 hz song. The Roesel's Bush Cricket is very hard to hear and not many people can actually hear them, even when I've put the headphones on them in the field they still can't hear the high electric sound. It is this reason that I've slowed the pitch down on these recordings. I particularly love the Long-winged Conehead pitched down as you can hear the individual scrapes of the hind legs rubbing each other in various different patterns. It goes to show just how complex these songs actually are and also how very different the hearing of a Cricket/Grasshopper, actually is. I hope you enjoy these recordings.

Roesel's Bush Cricket

None of the Birds on my list showed today but luckily a short trip to Llandegfedd saved the day in the form of a Roesel's Bush Cricket. 2 in-fact!. You know you're getting good at your crickets when you can recognise a cricket by its sound and that's exactly what happened today. The sound of a Roesel's is so iconic, it's described as a 'Savy's Warbler' rather than a Grasshopper warbler because it sounds like electrical wires rather than a fast trill. I'm returning this weekend to Llandegfedd as the weather is meant to be nice and I'll get some recordings for you but for now, here is a quick snapshot of the cricket in subject on todays walk.