So I have just got back from the longest holiday I have had in a decade. Ten days on Jersey. After really getting the bug last September, I was desperate to get back there and get in the rock pools again and this time I timed it so I could do some rock-pooling every day for that whole period. More importantly though, I was accompanied each day by Nicolas Jouault, who took us to all the best places on the island (including a two day trip to the Ecrehous, which was so awesome it's getting its own blog post). Nick's knowledge of the island's marine species and where and how to find them is incredible and I am so grateful for all the time he gave me. Here's me, Karen, Nick and Lou Wagstaffe (Lou came out with us to La Pulente and showed us loads of stuff there - check out Lou's amazing photography here).
We did find rather a lot! Before I get to Nick's discovery of Discodoris rosi, please indulge me in this sequence of dorids, neatly setting me up for a rather stupid gag...
We saw plenty of these Warty Doris Doris verrucosa. Not a new one for me but a pleasure to see these large nudis again. They're almost too big for the macro!
On the second morning out with Nick, we headed to Le Hocq and Nick soon found our target species. The behemoth among nudibranchs, Dendrodoris limbata. This massive species should be handled with care, as it secretes a toxin to help it consume the sponges that it feeds on. I went on to find another three animals, including two immatures! I could not get enough of them. This was one of the key targets for me on this trip. They are a recent arrival to Jersey.
Terrible photo, but turning a rock to see Dendrodoris limbata and a Green Ormer in a 'yin and yang' like embrace is the most Jersey thing ever! There were three species of nudibranch under this rock. While I am at it, it's vital to turn rocks back the way you found them and gently too. It kills the life under them that can't move very quickly. There are some utter tools out there doing this wholesale, likely driven by illegal fishing. Just turn the rocks back, it really isn't that hard. Anyway, rant over.
We saw quite a few Sea Lemons Doris pseudoargus. A common and widespread dorid.
This one was a lifer. Geitodoris planata. Large and dark, often with pale starry patterns on them. These were at La Rocque and also the Ecrehous.
Then back to the star of the show. Nick found a bright orange-red dorid under a rock at La Pulente. We thought it was something else at first but then noticed the pale rings. It's the ridiculously named Discodoris rosi. DISCODORIS! FREAK OUT! And freak out, I did. That was the most unexpected find and completely new to the Channel Islands! Nice one, Nick.
Here are the best of my shots. Check out the translucent bases to the rhinophores.
And finally, Grannydoris hominesis. A recent DNA test led to the discovery that I am one quarter nudibranch, explaining my obsession with these awesome creatures! You see, my late Granny Doris fooled everyone for decades - we had no idea she was a nudibranch (to be fair, I did always think it was odd that she got through so many sponges). Here she is with her rhinophores retracted, awaiting a fresh delivery of sponge from Kwik Save. Miss ya, Gran.
Anyways. Back to reality. Another lifer for me was the awesome little Celtic Sea Slug Onchidella celtica (not a nudi though). They are all over the pier at La Rocque, we saw some 50 animals in a square metre. You find these sitting out of the water quite high up the shore, they are very slug-like but cute.
Edmundsella pedata was the commonest sea slug on Jersey. I saw 50 in one day and well over a 100 on the trip.
Nice to see a tiny Montagu's Blenny right at the top of the beach. This was a four blenny trip, I think well over 20 species of fish in all. I'll cover them more on the Ecrehous post.
I got a lot of lifers in the squidgy groups, like sponges and tunicates! Here we have Pyura tessellata.
And what I have as Ascidiella scabra.
I should have warned this post goes on for ever. Aeolidiella alderi was widespread but in low numbers. We had one or two on each session.
And what I believe are their eggs. A bit of foreshadowing here. Many nudibranchs are identifiable by their eggs through experience, association and deduction...
Remember the rock I said had three nudibranchs under at Le Hocq? It had a single Dendrodoris and a couple of Edmundsella and round the edge it looked to be covered in small hydroids. I went for the close focus binocular trick and spotted a tiny bit of egg white with yellow highlights. Hold on a minute, that's a nudi! We gently got it into the lid of the Ferroro Rocher box and it was none other than Trapania maculata (turns out this was only the 4th record for the island). For the record, this was a 12 nudibranch trip!
At Rozel I found my first cup corals. These were common on the Ecrehous. This is Scarlet-and-gold Cup Coral Balanophyllia regia.
Also there, Manilla Clam Ruditapes phillipinarum. A recent non-native introduction to the island.
Facelina auriculata is surprisingly uncommon there. We only found two (one at La Rocque, one al La Pulente).
This place is incredible, like the surface of some alien world. Just watch these tides though, you can get caught out here easily. It's dangerous if you are not experienced and reading the tide all the time to go out far.
We found a couple of these stalked jellyfish Calvadosia campanulata, which is the one I see most often.
Nick identified this bryozoan at La Pulente, as the rarely-recorded Schizomavella sarniensis. There's so much stuff like this on the rocks, most of which I am clueless about. It's humbling but insanely addictive. I love being outside of my comfort zone.
I got very excited by this mollusc, only to figure out it's just an immature cowrie sp. (Trivia).
Round the other side of the island to Archirondel, Karen found these two Parasitic Anemones Calliactis parasitica.
And Nick showed me this incredible sea weed there too. It's Codium bursar and is quite scarce. It feels like a sponge and well deserves the colloquial name of French Beret.
Man, I can't get enough of this stuff. As you can imagine, I am pretty stoked. A huge thanks to Nick for all his help, time and knowledge. We were lucky with the weather but we saw no one else out recording in the rock pools. I am surprised that so few people are recording marine wildlife on Jersey. It's really important to record and submit records, so this is a plea for anyone reading this on the island or travelling there for a break, to do so. It's changing all the time too through climate change and accidental introductions and documenting these changes is really important stuff.
Furthermore, you can support the study of natural history on Jersey by joining the Societe Jersiaise here.
OK, I need a breather after all that. But I leave you with this collage that says it all really. Each of these was a lifer from this trip. I think I added about 55 species!
On the 11th, 12th & 13th July, Pan-species Listing had a presence at our second Global Birdfair and we were again listing the whole event on the site and the nearby meadows, hedgerows and woodland. We were keen to beat our 2024 total of 641 species but I have only just this afternoon finished identifying all the specimens. Did we make it? You'll have to wait... The set up was the same as last year, Mike set up a laptop and screen on our stand so we could tick species off as we found them and Andy arrived on the Saturday. I ran six one hour bioblitzes each day at 10.00 am and 2.00 pm (it was much hotter than last year and they were tough) and as we'd done it last year, far more people knew to bring their records to us. Especially those camping and running moth traps.
Here's our stall, with this year's new recruit, Mark Colvin who helped out for all three days.What a legend! A huge thanks, Mark.
We had Gatekeeper and Humming-bird Hawk-moth in the stall before we had even set it up.
I ran a talk to kick things off and the first two bioblitzes were extremely hot, setting the scene for a sweltering weekend! It's great to see familiar faces at these events.
As per usual, I forgot to take photos of people or landscape shots for that matter - just close up shots of small invertebrates and moths in pots. The first trap we opened on the Saturday morning was really lively and I got a couple of lifers. Eudemis porphyrana is a Na species on apple (which is abundant there). I have been wanting to see this for years! As I close in on 10,000 species, I still find new species most days, averaging at more than one species each and every single day, even in places that don't at first glance seem that exciting. If you hit any site hard and for long enough, you'll find something exciting!
The moth list for the weekend was nearly double that for 2024, as was the butterfly list. Purple Hairstreaks were doing very well. Then the Saturday bioblitzes started and we met this star, Billy! Billy and his mum Clare came out on two of our bioblitzes and we were all gobsmacked at how good a naturalist Billy already is at age 10. Not only that, he is super keen and really good at finding stuff and spotting things that are different (all the photos of us out in the field here were taken by Clare). You know it's going to be a great hour when species #1 is Osprey!
Billy found some great stuff too. Including this Stoat skull!
We turned a log and Billy knew this was a Lesser Stag Beetle straight away! I don't think I knew this species until I was about 30. He is planning to join us and help us out even more next year, and we look forward to seeing him then and how much his pan-species list has grown by then! Keep up the great work!
The best way to do well in natural history is to start when you are young, so he's on a tried and tested route to end up doing something really exciting in the field as he gets older.
I wandered around a bit more this year and found a few more interesting areas. There are some big old trees here and many of the more interesting beetles are deadwood associates. Such as Platystomos albinus (Nb). So, did we beat last year's total of 641 species? Too right, we smashed it with 824 species! Here is the breakdown compared to last year's stats, along with an accumulative total for both 2024 and 2025 combined.
Look at that accumulative total! In just six days over two years in July we have recorded 1,036 species at Global Birdfair 749 of which are invertebrates. Of the 824 species we recorded this year, 395 were not recorded in 2024. This is not surprising though, it's amazing how many invertebrates you only ever find one of when surveying. Pan-species Listing can help you become a really great all-round naturalist but when we are considered collectively we can be formidable. A massive thanks to everyone who contributed records, especially Ben Rumsby and his dad (and for turning my trap on when I was off site) and also to Neil Phillips.
Next year I will be doing book signings, as it is due to be published on the 27th January 2026. You can pre-order it
here. You can sign up to pan-species listing
here for free!
And finally, here's all 824 species from those three days! I have highlighted the 17 invertebrate species with conservation status here in bold with their abbreviated status.
UDATE: I should add that we were not policing or verifying other people's records that were brought to us here, all species were accepted on face value and the records to be submitted directly by each observer. Away from moths and birds, most of the records were ours however. Also, thanks to Skev it seems that Monochroa palsutrella is a county first (we trapped this on an amazing tropical night on the 11th to 12th along with quite a few wanderers and lots of by-catch).
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