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

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

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