Unforgettable #Hymathon2025, a virtual symposium of International Society of Hymenopterists Hymathon is the society’s annual 24-hour-long marathon of Hymenoptera! Join online from anywhere in the world to listen to presentations from Hymenopterists, present your own research, participate in social events and make new connections. It is full of research talks, fun events, and more than a small amount of chaos as the 24 hours reaches the end! Hymathon 2025 occurred on 4–5 December 2025, with four sessions over the 24 hour period.

Unforgettable #Hymathon2025 ❤️

Looking forward to our new meetings with @hymenopterists.bsky.social

#Hymenoptera #Braconidae #Ichneumonidae #Chalcidoidea #bees #wasps #ants #sawflies

Thanks everyone involved for running such a fantastic #Hymathon2025 yesterday! 🥰

Learned a ton and great getting to know/catching up with hymenopterist from all around the world!

See you all again next year!

And there finishes #Hymathon2025. This was an amazing experience which allowed me to discover amazing subjects and meet awesome people. I can't wait for its next edition (and maybe this time, I won't be devoured by stress for my presentation)!

Finishing off a lovely pt2 of #Hymathon2025 with:
- the Bush Blitz Blood Pact (may contain helicopters 🚁)
- Taxonworks BBQ party (sadly, no actual food 😆)
- ISH private jet (looks like showdown winners ofc🏆)
- Even MORE galls! (the gall of it all)
- Hymenopterist or Film Director?

Pt3 in ~3 hours!

Whoop~ Taiwanese wasps mentioned! 🇹🇼 🎉 (Hsuan-Pu Chen @Hokkaido Uni & NTU)

Species richness in Taiwan Bassobates (subgenus of Darwin wasps) up from 3 to at least 35 sp. (due to temperate taxa found in mountainous area of otherwise tropical island).

New # moves it to 2nd most Netelia! #Hymathon2025

"MANY types of ecologically-based reproductive isolating barriers can contribute to speciation... and you can't measure them in a tube! - Habitat isolation - Temporal isolation - Immigrant inviablity -Ecological Hybrid inviability"

Slide from presentation: "If evolution of sterility were so important for speciation, these insects would not be able to make babies! But often we find little or no evidence for intrinsic post zygotic isolation/genetic incompatibilities"

Continuing #Hymathon2025 w keynote 2 by Andrew Forbes @ Uni of Iowa!

"For specialist insects, there is far more evidence supporting strong, ecological forms of reproductive isolation than post zygotic isolation"

aka. Ecological factors (eg. where they live) > Offspring repo issues for speciation!

I’ll share new records from Vietnam and Taiwan and a glimpse into the secret lives of these remarkable wasps.
Still new here, but excited to connect with everyone and cheer on your talks as well.
Looking forward to a great Hymathon together!
#Hymathon2025

Hello Bluesky! I’m finally here too!
I’ll be speaking at #Hymathon2025 about Doddifoenus—those long, metallic-blue “small giants” of Chalcidoidea.
My talk is 07:40 UTC on Dec 5.
Would love to see you there!!

International Society of Hymenopterists

Lurking at #Hymathon2025. It's an amazing concept- a 24hr virtual conference engaging researchers on the bees, wasps, and ants, across the globe and across timezones.

Ideas already flowing for activites we might facilitate in 2026, stay tuned.

Go ISH! www.hymenopterists.org

What's that buzzing noise I hear...? 🐝

It's #Hymathon2025 , a 24-hour online marathon of all things wasps, bees, sawflies and ants starting up soon! 😄

@hymenopterists.bsky.social

~~~
Will mainly be around for session 2 & 3 cus time zones but looking to catching some comp entries & showdown! 👍

Starting in 20 minutes! The Zoom room is open and the slides are rolling - time to grab some snacks and settle in for 24 hours of Hymenoptera! #Hymathon2025

Colour variation in the #Megachile subgenus #Megachiloides has likely had an impact on #conservation assessments for some of the #species. I will be talking about this later today at #Hymathon2025 #bees

Tomorrow! I'll be moderating the first session of #Hymathon2025 with a keynote presentation by @amelialindsey.bsky.social and lots of interesting research on ants, bees, sawflies, and wasps!

ART COMPETITION during #hymathon2025

Submission Deadline: Nov 22

Categories:
1. Photography - Specimen
2. Photography - Live Hymenoptera
3. Photography - Hymenopterists in action
4. Illustration - Scientific
5. Illustration - Fun & Artsy

Submit your works: docs.google.com/forms/d/e/1F...

Hey Hymenoptera students! Here’s your chance to win a great book by presenting during #Hymathon2025! Talk about awesome wasps and have the chance to win a book…what could be better?!

📢CHALCIDOIDEA STUDENTS!📢
🧨Here is your chance to win a physical copy of the “Chalcidoidea of the World” book by Prof. John Heredy & Prof. James Woolley!
👉All you have to do is give the best Chalcidoidea talk during the #hymathon2025 online symposium, held on 4-5 December 😁

Get pumped! #Hymathon2025 is open for registration. We have some great plenary talks lined up already, the art contest is returning, and the Hymenoptera Showdown will have some truly unhinged entries. Don't miss it!