- Baltimore
- Crazy Tuesday
- ELOGE DU MOCHE / IN PRAISE OF UGLINESS
- Flickr Friday
- Howard County Conservancy (HCC) BioBlitz
- invasive species
- Maryland Biodiversity Project
- Maryland Nature Photography
- Maryland Wildlife
- MBP Afield
- MBP Fungi
- MBP to Review
- Murals and Mosaics
- Native Plants of Maryland and the Delmarva Peninsula
- Photography
- quarantine art
- Square Format
- Today's Flickr
- Urban Fragments 2 (NO people)
- Urban Landscape
- Urban Photographers Group
- Urbane Melancholie
- Wednesday Walls (No People)
- Your Best Shot 2020