HelenaSep 9, 2025
Galls! galls! galls!
I am embracing gall week over on iNaturalist and spending time going on very slow walks looking at every potential gall host.
Oaks are a popular host - previous gall weeks meant I learned about some of the galls on Oak.
Some of the many and various galls found today shown here.
More info and names (as far as I know them) in the alt-text
*edit typos - spangle galls
#galls #GallWeek25
Colin PurringtonSep 7, 2025
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 Week September 2025

Welcome to the 8th Gall Week event! During September 6-14, please document galls = structures induced by arthropods, fungi, and sometimes bacteria on plants. Please do not document here leaf miners or other evidence of feeding, unless they are gall-related. To participate, please join the project, document new observations between 9/6-14, and upload them manually to the project. Uploading observations can continue after the event ends. More info from our earlier projects: Don't forget to add information about the host plant - as a note, or even better, in the fields: Host and Host plant ID field. You can also link to the host plant observation, especially if you're unsure what it was. If you've never done this before, you can check what the best host plants are in your area. You can use gall or insect books from your area, websites (such as https://gallformers.org/), podcasts (https://podcast.naturesarchive.com/2021/09/14/galls/), and iNat. You can view all previous Gall Week projec...

iNaturalist
Colin PurringtonSep 1, 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
Gall Week September 2025

Welcome to the 8th Gall Week event! During September 6-14, please document galls = structures induced by arthropods, fungi, and sometimes bacteria on plants. Please do not document here leaf miners or other evidence of feeding, unless they are gall-related. To participate, please join the project, document new observations between 9/6-14, and upload them manually to the project. Uploading observations can continue after the event ends. More info from our earlier projects: Don't forget to add information about the host plant - as a note, or even better, in the fields: Host and Host plant ID field. You can also link to the host plant observation, especially if you're unsure what it was. If you've never done this before, you can check what the best host plants are in your area. You can use gall or insect books from your area, websites (such as https://gallformers.org/), podcasts (https://podcast.naturesarchive.com/2021/09/14/galls/), and iNat. You can view all previous Gall Week projec...

iNaturalist