It's took quite some effort to race through the remaining specimens and get the data into a useful format, though here we are. First off, all the photos in the post (unless I state otherwise) are Dave's that he took with his phone (like this stonking Stenocorus meridianus on Wood Spurge at Hoyle). They are far better (and more numerous) than the few I took on the day.
Before I start, a massive thanks to everyone who donated. We raised an incredible £2680! You can still donate here.
First off, the overall total for the challenge was 1072 species found, recorded and identified on the day. Just 37 species more than we managed in 2017. However, with the specimens I took, that figure rose to 1158 species. Pretty pleased with that. The total number of invertebrates found and identified on the day was 555 species, rising to 622 with all the identifications added. Here's how are totals compared to 2017 and what they looked like after the identifications made post 25th May were added. I was surprised we had such lower plant totals but we really did well on spiders and beetles.
Our route went: Burton Pond, Graffham Common, Hoyle Farm, Levin Down, Rewell Wood, Climping Dunes, Peppering Farm and then back to Dave's. Singleton and Charlton were also pretty good!
Burton Pond
I'll put the full species list at the end but for now, some highlights. First up, Burton Pond. We spend the first seven hours at this very diverse site on the Greensand Ridge. I was pleased to find that we recorded 73 species of invertebrate there that had not been recorded there before, including five species never recorded on a Trust reserve before. Such as this Nationally Scarce sapro, Prionychus melanarius I found under bark in the Warren.
We set the moth traps up and turned them on at exactly midnight, with one minute to spare! We then got onto beating, sweeping and suctioning before the dew started. I am not good on very little sleep and spent the first two hours trying to overcome an intense sense of impending doom. Then the Moon came up and it started to get pretty cold - but it was really weird being out so long that we watched the Moon go back down again. We did get a few good moths though, including 15 species new to the site. Surprising for such a small moth list and a well-recorded site!
Bird's Wing was indeed new to the site and Dave got excited by it!
A Privet Hawk-moth scared the bejesus out of us!
While we got a few larvae as well, including a couple I have not come across before. This is Dingy Footman.
And this two-tone fluffkin is actually a Rosy Footman!
Nightjars were all over Burton, which really surprised me. Over the day we got to 77 bird species, which I think is pretty good as we did not chase a single bird. We didn't however see a Kestrel, Little Egret or Bullfinch (the Great White Egret we had over Welch's Common on the reccy was a big ask to see on the day). I think I got about 10 lifers (which has helped get my personal pan-species list to 9000 species, wahoo!), mostly through the specimens but this gelechid was common at light there. It's Carpatolechia proximella.
We left Burton after a glorious sunrise to head to Graffham Common. Great photo, Dave!
Graffham Common
For some reason, we didn't take any photos at all at Graffham. It was oddly quiet there. Uloborus walckenaerius was in the first sweep net and we soon heard Hobby, Siskin, Crossbill and Garden Warbler. We still got 12 species new to the site, including (and this really surprises me) Lesser Cockroach - which was new to the Trust reserve network. I am sure it must have been reported from Rye Harbour?
Hoyle Farm
We got to Hoyle shortly after 9.00 am. I first surveyed this site last year and my third visit of the survey produced the most field dets I have ever had (297 inverts in just six hours of recording back in August last year). So we had to visit it. It did not disappoint. After a slow start at Graffham Common, it soon felt like we might make the 1500 species after 2.5 hours at Hoyle. Despite recording 621 species over three days last year, we still recorded 50 species on Saturday that I did not pick up last year. A highlight for me was this Pilemostoma fastusoa (Nationally Rare and Near Threatened) this species is not that uncommon on Common Fleabane in the West Weald. In fact, we had five species of tortoise beetle in an hour. So have a Nationally Scarce Cassida prasina too! These are my only photos here, my lens looks scratched compared to how bright Dave's phone shots are.
I was explaining to Dave my rule that if I see something, I have to sample it. I saw a big stand of Blackthorn and tapped it. Out popped a Brown Hairstreak! It's not every day you see this Vulnerable, Section 41 butterfly and it made up for the lack of any Purple Hairstreak larva.
We got into the woods there which were also really great, including large charismatic species such as the longhorn at the top and this Chrysomela populi on Aspen.
A massive thanks to Bianca for hosting us and a providing coffee and nuts! I'm glad we were able to find so many new species for the site, including some really key invertebrates.
Levin Down (via Singleton and Charlton)
It got very hot between 1 and 2 pm and I started feeling a bit unwell in the sun. But I ploughed on. Obviously we added a lot of new plants but the inverts were not coming through as thick and fast as we would have liked.
We did get a few nice spiders though. Including the Nationally Rare/Vulnerable Trichoncus saxicola, at its only Sussex site. Entelecara flavipes (another Nationally Scarce money spider) was new to the whole reserve network. Butterflies were good, with Grizzled Skipper, Dingy Skipper and Small Blue added here (we had 15 butterflies on the day!). This ball of Common Blues in mating frenzy was something!
A few nice bees too but they were not new to the site, Stelis ornatula, Andrena florea, Ceratina cyanea and Osmia bicolor were all nice and easy to ID species (although I didn't spot the Ceratina in the field). However, the super rare stonefly Nemoura lacustris that I found in the specimens was a lifer and another species new to the reserve network. On the NBN, there is a cluster of records around Charlton would you believe it. I guess it must be a chalk stream thing! What a result. I am so pleased we added 24 species to the Levin site list. In fact, between the three Trust sites we surveyed, 109 were new site records and a whopping NINE species had never been recorded on any Trust reserves.
This site really didn't pay off for some reason (two many species already picked up on similar soils maybe) and it went from being swelteringly hot to cool in the blink of an eye. A Pearl-bordered Fritillary was a target but the Cream-spot Tiger netted in flight was a highlight. It was at Rewell that it dawned on us that we were not going to make the 1500 species.
Climping Dunes It was quite cold by the time we got to Climping, so many of the species I found on the reccy could not be refound. The plants were great though. And Sand Catchfly was a highlight for the whole day. There were a few nice inverts like Grey Bush-cricket, Dune Robberfly and Acrosathe annulata.
And the days only fish...a Small-potted Catshark.
And then back to Dave's for more moth-trapping and microscope work. It wasn't long before this Pygmy Shrew paid us a visit!
Although the first moth trapping at Burton was quiet, the trap was quite lively with an Alder Kitten a rare encounter for me. The last species of the day was this Great Silver Water Beetle. I was sat at the microscope for 2.5 hours but probably only added about 40 species. It was much harder doing this tired in someone else's house than I expected. In fact, it took about 15 hours to process all the specimens, and they only added about 150 species. So, for the 24 hour challenge, I actually think you are better not taking specimens. From a records point of view though, many of the best records came out of this lot.
So that's it! Here's us at about 7.00 am. We did not look like that by the second midnight! So before I finish with the entire species list, it's so long until the next time we are crazy enough to try something like this again.
Oh, one last thing. Out of the 622 inverts we recorded on the day, a whopping 58 had some form of conservation status (such species are included in bold in the following list). Many of these are now out of date but I have not had time to differentiate these. Also, this list is the full 1158 species and includes the 86 microscope IDs added after the challenge, I'll try and update it if I get time but a period of high pressure means I will be head down with work for days/weeks now.
So, we didn't get to 1500 species as hoped. In fact, we were considerably short of it. We got to 1,069 species (expect this number to change a bit as I process the data, I suspect it might go up a little actually but not by much). Now this is more than we achieved in 2017 but not by much and interestingly in 2017 we got to 1,000 species way before we did this time (in 2017, species 1,000 was Drilus flavescens at around 19:30 at Levin, while on Saturday it was Rosy Footman at 22:00!). Despite seven years more experience, better planning and better health (hay fever and bad knees didn't scupper us this time), we struggled at times to build up that big list of inverts we had hoped for.
The same view as above obscured by two dodgy-looking Homo sapiens (species no 1).
Firstly, it wasn't for want of trying - the whole thing was a mixture of incredible highs and a few lows. We did not stop for the whole 24 hours. Getting up at 22:45 with just four hours sleep was brutal. Then hearing Nightjars, Field Crickets, Woodlarks and Nightingales all around Burton and watching the sunrise there was just wonderful. Feeling feint on Levin was really nasty but seeing the huge diversity of wildlife at Hoyle Farm was a site to behold. From species 2 at 00:00 being Field Cricket through to the final species at 23:59 being Great Silver Water Beetle at light, we did not stop for the whole 24 hours except to drive between sites and eat.
Several things didn't line up for us. Despite great weather in the day, between 02:00 and 8:00 it got very cold, and the dew was so heavy at Burton Pond it made sampling then impossible. It's not been a great season for moths either, so the first moth traps at Burton, were very light on moths. We also had a couple of sites that didn't produce as many species as we had hoped and finally, by 17:00 the sun went in and it got very cold again. It's also a lot harder to identify species at the microscope when you are tired out of your mind than I was expecting! And collecting specimens takes time too, which must eat into this. Game theory is quite key to this challenge and some things that you think will work in your favour don't necessarily pay off. However, all of these specimens will be identified (probably this week looking at the weather). And I will include them when I write a more detailed blog later this week.
I have entered nearly half the data so far and a few early stats include 109 species of spider, 15 species of butterfly (including this lovely Brown Hairstreak larva at Hoyle Farm) and and 146 beetles. I was hoping for something like 400 beetles and 200 spiders, clearly I was wrong to aim so high. Is 1,000 inverts possible in day? I think so easily but maybe if you are only doing inverts. Not sure how many plants we have but the Sand Catchfly at Climping was a highlight for Dave.
And finally, the really amazing thing is how much people have donated! We have raised £2284 for Sussex Wildlife's Trust reserve management! A huge thanks to everyone who donated, especially to the Pebble Trust, Edward Norfolk and Charlie Burrell for their incredibly generous donations. You can still donate here on the Just Giving page. Anyways, watch this space for a full write up later this week.
For the last few years, I have been keeping a daily total of all the invertebrates I have identified in the field (field dets) on any given day's surveying on a single site. Every day I do this and weirdly, I seem to be able to remember each day, within one or two species. So why bother? There is a very good reason; gamification. By constantly competing against myself, I get better and better at identifying in the field. This serves a number of important functions:
1) I have to kill fewer invertebrates to identify them. They are very happy about this.
2) Which further saves me time in the winter at the microscope.
3) I become a more effective naturalist, by understanding what I am seeing in the field as I see it, which benefits my understanding of autecology. Identifying all specimens at home feels a very detached way to record to me.
4) It helps to push the boundaries of what is considered identifiable material, something that is particularly relevant with spider recording.
5) It allows me to frame how good the day's surveying has been based on the other totals I have been recording that year. Anything over 200 always feels like a good day and 250 is exceptional, for example.
6) It keeps my energy levels up and is fun!
This shot was taken by the owner of the site, Bianca Pitt. It's been great that Bianca was able to come out with me not just once but on every visit. So much so that I could see Bianca learning her plants over the summer but also, it's a great way to learn about habitat management, grazing, surveying etc etc and the two way flow of information makes it easier for me to write my report and tailor the recommendations. And I enjoyed having the company, as it's rare that someone is so keen to come out. I wish all my clients would do this at least once. So many people who work in land management find themselves too busy to spend time in the field, learning about wildlife and understanding the sites they are managing. How can this be right?
I digress, back to the field identifications! If I am not sure, I still take the specimen and 'ground truth' it back home, this being an important 'bridging' technique towards being comfortable at making a call in the field, however some species will never be field identifiable and you will always have to take them to ID them correctly. It's important to state that you can't fast-track this process; you can only confidently identify in the field after spending years identifying things at the microscope. You need to know exactly how and in what position to hold the invertebrate, where to point the hand lens and what to look for and do this efficiently. You also need to be able to hold identification guides, keys and spider genitalia images in your head. Again, something that comes from a great deal of repetition. It's peak entomology!
Late May/early June has always seemed like the time that I would get the biggest lists. Last year, I got two sites in the 270s in this time period, with the record for the total number after microscopic identifications being 355. Prior to this my record was at Ken Hill in 2019, again in May/June. So, I was not expecting to blow this out of the water in early August! Especially, as to the untrained eye, it might seem like a bad year for invertebrates; it really is not though. There is a LOT out there at the moment, with some very high species-counts to be made.
The site was Hoyle Farm in West Sussex. It has a number of features that make it perfect for a large day list:
1) It's in the West Weald. This part of Sussex is a fantastic landscape for invertebrates.
2) It's on the edge of the Green Sand, so has some magic soils and associated vegetation but this moves to heavier soils in places, adding to the diversity. There is some woodland with glades too, that is also very rich in invertebrate life.
3) It's a medium-sized site at c100 ha, that's compact and easy to get around, so I could spend six hours solid recording without lots of time moving between compartments.
4) The site is sympathetically managed. Chiefly, the grassland is not over or under-grazed and significant parts of the woodland have an open structure. The site has a great deal of nectar sources, bare ground, some old growth oak, plenty of shelter shelter and structural heterogeneity - perfect conditions for invertebrates.
The method was my standard farm 'bioblitz' method for recording on farms. Split the site into six roughly similar blocks and spend an hour in each. I record as many invertebrates, plants, birds, mammals etc as I can. I was pretty surprised therefore, that this methodology (and not just an invertebrate survey) would be the one to beat my record and it wasn't until I finished the first hour that I thought I stood a good chance of beating that record. I was on 101 species and had recorded the sandiest, most open compartment first. In this 101, I think I had had about 10 species with conservation status. So, I decided to go for the record. Five hours later, I was on 298 field identifications. I fast-tracked the microscope work, adding a further 69 species. This ended up being 367 species in all (with a whopping 32 of these having conservation status). A total of 789 records were made on the day. Rewarding but exhausting work
This is an amazing site. I can honestly say it's the nicest acid-grassland I have seen in Sussex and some of the best I have seen anywhere away from the coast or the Brecks. It has some amazing plants that I could write a blog about alone (including several I have not seen in Sussex before), including; Hoary Cinquefoil, Mossy Stonecrop, Smooth Cat's-ear, Knotted Clover, Subterranean Clover, Common Cudweed, Corn Spurrey and more Common Stork's-bill (below in May) than I have seen before! The first bird I heard as I got out of the car on my first visit was a Woodlark.
So here are some of the goodies from 2rd August (I have included a full species list of the 367 species found on the day below). One of my all time favourites, the Hornet Beetle Leptura aurulenta, a Nationally Scarce longhorn beetle and THE beetle that got me into beetles, after I went looking for it in 2009 at Ebernoe on a hunch, and found it! Fourteen years later, I have seen 1653 species of beetle in the UK.
Beating this Lichen Running-spider Philodromus margaritatus from Ash was a real surprise! After Graffham Common and Lavington Common, this is only the 3rd known site for this charismatic spider in Sussex. Nationally Rare, Near Threatened and Section 41.
And I had a trio of lifers too.
The hopper Aguriahana stellulata, which I have long coveted.
The Nationally scarce a weevil that feeds on Dark Mullein, Cionus nigritarsis, was a long overdue lifer too.
And a striking cranefly swept from the woods (with yellow wings and legs) turned out to be the Nationally notable Tipula livida. Here is the female's paraphernalia under the microscope.
Other highlights included Woodland Grasshopper (Nationally Scarce).
And Attactagenus plumbeus, a Nb weevil I see on acid-grassland occasionally.
This was taken earlier in the year, but the much smaller spiderlings of Alopecosa cuneata are still field identifiable now and are much more widespread. Another benefit to learning the early stages of species.
Probably the rarest thing though was a species I had new to Sussex at the neighbouring farm in 2020 (c500 m away from this record). The pRDB1 Scythris potentillella (no photo I am afraid). Scythris are small micro moths that I encounter (possibly more than any moth-er in Sussex does) by using my suction sampler, which is a great way to record this whole genus - almost all of which are classed as scarce or rarer. This one feeds on Sheep's Sorrel. Targeting Sheep's Sorrel for Dalman's Leatherbug is therefore the way to find this rare moth (as on both occasions, that's what I was looking for). I also found the Nationally Rare rhopalid bug Rhoaplus rufus.
I run the day's data through Pantheon (the Biological Record Centre's online database for analysing lists of invertebrates) and the SQI (a measure of site quality based on the proportion and weighting of the rarities present) came out at 137, this is really high for one of my surveys (my average is 123.9). The true SQI is likely to drop a little when the the three dates are combined but this was a really interesting exercise. A total of 32 species for the day (at least 50 for the whole survey) is quite remarkable. My average for all surveys (ranging from three to six days - not just one visit!) is 34.5 species with status. Showing this has both quantity and quality. Here is the sward in August, full of nectar and rare invertebrates.
We discussed habitat management at length and it's great that many of the changes required to make this site even better are tweaks rather than radical changes in direction. This is an important, low nutrient, low pH site, with an invertebrate assemblage closer to a nature reserve than a farm and I am glad it's in safe hands. I can't wait to go back in a few years and see how it has changed! Now, here is the entire species list, starting with the field identifications. Species with status highlight in bold and conservation statuses in brackets are thought to be out of date. NS = Nationally Scarce, NR = Nationally Rare, Nb = Nationally scarce b, Na = Nationally scarce a, NT = Near Threatened, S.41 = Section 41, Nn = Nationally notable, etc.
And then a further 69 species identified at the microscope, which I fast-tracked so I could write this blog.
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