| Maryland Ornithological Society: Activities, checklists for Maryland and DC, bird programs, list of hotspots, rare bird photo gallery, guide to hawk watching sites, bird count results, publications, and Maryland/District of Columbia Records Committee reports and lists. |
| Allegany County Bird Club: Events, sanctuary map, recent sightings, and birding quiz. |
| Assateague Birdwatching: General overview. |
| Baltimore Bird Club: Rare bird alerts, newsletters, site guides, trip reports, checklist, backyard birding, and many links. |
| Bird Checklists: Seasonal checklists for 9 refuges in Maryland. |
| Birding in Kent County: Kent County Chapter of MOS. Events, birding sites, count results, and checklist. |
| Calvert County Birding Spots: Offers guides to six areas. Includes descriptions, hours, admission information, and directions. |
| Cecil Bird Club: The Ornithological Society of Cecil County. Events, Turkey Point Hawk Watch, county checklist, and site guides to 12 Cecil County hotspots. |
| Frederick County Chapter: Chapter of Maryland Ornithological Society with details of two rarities. |
| Harford Bird Club: Newsletters, field trips, checklists, count results, and a site guide for Conowingo Dam. |
| Howard County Bird Club: Field trips, events, a checklist, county birders' lists, and photo gallery. Also includes checklists for the area's insects and wildflowers. |
| Mary Scott's Birding Maryland: Travelogue and photos of 11 Maryland birding spots. |
| Maryland Osprey: Subscription information and archives for the mailing list for discussion of birds and birding in Maryland. |
| MD Bird Photos: Photo gallery of birds found in central Maryland by June Tveekrem. |
| MDOsprey Archives: Searchable archives of the Maryland birds and birding e-mail group. |
| Montgomery County Chapter: Chapter of MOS with news and events, newsletters, and site guides. |
| The Nest Box: Information about backyard birding, descriptions of Calvert County birding spots, count results, photo gallery, and other resources. |
| Worcester County Birdwatching: Birding sites, seasonal abundance checklist, and birding events for Maryland's only coastal county. |
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