#gallweek2025 — Public Fediverse posts

Here are the stats for Gall Week 2025: 13,300 observations, 1004 species, and 886 participants. These numbers will climb as people upload their pics and manually add them to the project. #GallWeek2025 #gall #galls #inaturalist #insects #mites #nature https://www.inaturalist.org/projects/gall-week-september-2025

One thing you learn very quickly when photographing oak galls is that bald-faced hornets are huge gall fans, too. #GallWeek2025 #gall #galls #cynipidae #oaks #nectar #wasps #insects #biology #hymentopera #hornets

@nev I should have given everyone a heads up last week but I was distracted by #GallWeek2025.

Found some banded bullet galls (Kokkocynips imbricariae) yesterday. I also found a dollar near the tree. It was a good day. Media, PA, USA. #GallWeek2025 #gall #galls #wasps #cynipidae #insects #entomology #oaks #quercus

Excellent podcast on galls featuring Adam Kranz. #GallWeek2025 #gall #galls #insects #mites #biology https://naturesarchive.com/2023/04/10/spring-galls/

Black cherry leaf gall (Eriophyes cerasicrumena) that has split open and released the vermiform mites that have spent the summer inside. #GallWeek2025 #gall #galls #mites #cherry #prunus #biology #eriophyidae #macrophotography

@FastGhost @GuyBirkin In case Mastodon ever fails you, upload to iNaturalist. Happy #GallWeek2025 ! https://www.inaturalist.org/observations?preferred_place_id=97394&taxon_id=127758

These oak button galls (Neuroterus umbilicatus) give a nice sense of how small cynipid wasps are. I've seen photographs that are so loaded them that you can barely see the leaf surface. #GallWeek2025 #gall #galls #cynipidae #oaks #quercus #entomology #nature #wasps

Jewel oak gall (Acraspis quercushirta), living up to its name. Little Crum Creek Park, Swarthmore, PA, USA. #GallWeek2025 #gall #galls #cynipidae #oaks #quercus #entomology #nature #wasp

Yesterday's fun gall find was Phylloteras sigma (Cynipidae), a rarely-photographed beauty with no common name. iNaturalist observations are mainly in PA, DE, MD, VA, and DC but BugGuide lists NY, too. Reported on both Quercus alba and Q. muehlenbergii. Little Crum Creek Park, Swarthmore, PA. #GallWeek2025 #gall #galls #cynipidae #oaks #quercus #entomology #nature #gallformers

took the fancy camera to high park this morning!

i was mostly looking for galls for #GallWeek but i also saw plenty of sand wasps enjoying the sun, and a coyote! i was walking away from it but it crossed the street to avoid me anyway and a car that was going too fast had to stop for it 🙄

(there are Plans to gradually #BanCars in High Park, people are big mad)

#galls #GallWeek2025 #bugstodon #insects #wasps #coyote #coyotes #Hymenoptera #Crabronidae #Bembicini

@colinpurrington
Got my first one in my garden this afternoon. Stem gall in Helianthus.
https://www.inaturalist.org/observations/312488464
#GallWeek2025 #Biodiversity #NativePlants #GardenEcology #Ecology

Stumbled onto this gem while admiring observations in iNaturalist's Gall Week 2025 project. The two-tailed gumtree gall (Apiomorpha duplex) is, per "Brisbane Insects and Spiders" blog, the world's largest gall. Like many galls made by scale insects in the Eriococcidae, the species makes sexually-dimorphic galls. This gall is induced by a female; male galls are knobs on leaves and don't seem to be photographed much. #GallWeek2025 #eucalyptus #gall #galls #homoptera #insect #gumtree #entomology #inaturalist #australia
https://www.inaturalist.org/observations/312424393

@colinpurrington Wow, they are amazing! Found some nice galls here too :) #GallWeek2025 #galls #gall

Finally, here's another new-to-me gall that I've very, very tentatively ID'd as something made by Ophiomyia tiliae, a fly in the Agromyzidae. If I get a correction on iNaturalist I'll update this post. Possibly not even a gall! 5/5 #GallWeek2025 #gall #galls #inaturalist #mites #flies #diptera #tilia #basswood

This gall is new to me so I hope I have identified it correctly. I think its a tupelo leaf edge gall (Aceria dina). If you squint you can see a mite walking on the upper right side of the upper fold, although I'm not sure if it is the eriophyid mite that makes the gall. 4/5 #GallWeek2025 #gall #galls #inaturalist #mites #arachnids #tupelo

This beautiful gall is made by the fungus, Rhytisma americanum. The common name is "American tar spot" to differentiate it from the other two members of the genus (in North America) that parasitize maples. The others are not nearly as pretty. 3/5 #GallWeek2025 #gall #galls #inaturalist #acer #maples #fungus #fungi

This is Andricus nigricens, another cynipid wasp that makes galls on oaks. Each lobe is home to a single larva (and possibly a parasite, because such is life). 2/5 #GallWeek2025 #gall #galls #wasps #oaks #cynipidae #inaturalist #quercus

Thread of the five types of galls I found yesterday. First up are oak rough bullet galls (Disholcaspis quercusmamma), protecting themselves from parasitic wasps by attracting ants with nectar. Swarthmore, PA, USA. 1/5 #GallWeek2025 #gall #galls #wasps #ants #oaks #cynipidae #inaturalist #nectar #nature #biology #quercus

I don't want to name names but apparently some of you did not go out and take photographs of galls yesterday. #GallWeek25 #GallWeek2025 #GallWeek #gall #galls #insects #inaturalist #entomology #nature #cynipidae https://www.inaturalist.org/projects/gall-week-september-2025

Gall fans, it's almost time for this year's week in the spotlight: September 6-14, 2025. #GallWeek #GallWeek25 #GallWeek2025 #gall #galls #plants #insects #inaturalist #biology https://www.inaturalist.org/projects/gall-week-september-2025

Here's a screenshot of the 10 most common species found during a previous spring gall week on iNaturalist. Join the project linked above to learn more. #inaturalist #gall #galls #GallWasps #GallWeek2025 #gallformers #cynipidae