Registration
Update (posted at 12:00 pm on July 12): Registration for the 2026 MOS Convention has been closed.
We may have some convention participants cancel before the Sept. 1 registration cutoff date. If you wish to add your name to the waitlist, please click here and follow the instructions. If someone cancels, we may be able to register you.
Please note: MOS has capped 2026 convention registration at 200 participants. This is due to space limitations for afternoon and evening events at the DoubleTree by Hilton, our convention hotel. This will not be an issue for the 79th Annual MOS Convention, which will be hosted May 21-23, 2027 at the Wisp Resort in Western Maryland.

Field Trip Sign-ups
Field Trip sign-ups will open on Monday, August 3 at 6:00 pm for registered participants. You must be registered for the MOS Convention to sign up for field trips.
If you have any questions about the convention, please email Jim Rapp at jim.rapp@mdbirds.org.
Refund Policies
- MOS reserves the right to cancel the convention due to unforeseen circumstances, to include a new surge in COVID-19. If that occurs, MOS will refund all registration costs to attendees, including meal costs and donations.
- If an attendee cancels before the end of the registration period, MOS will refund all registration costs to attendees, including meal costs and donations.
- If an attendee cancels after registration closes, MOS will refund the attendee’s registration fee and donation, but not the meal costs because MOS included them in the headcount and are thus liable for that cost.
- If that attendee became a member of MOS for this convention and cancels, they will be given the option to receive a partial registration fee refund and remain a member, or have their full registration fee, meal costs and donation refunded consistent with the pre- or post-registration cancelation policies above.
- All refunds will be consistent with the refund policies. You may request a refund by contacting the MOS Convention Registrar at registrar@mdbirds.org.
How to receive a refund of your MOS Convention registration
If your request is accepted and your registration was made via PayPal or credit card you will be issued a refund via PayPal and should see a credit within approximately a week. If you paid your registration via check and your request is accepted the MOS Treasurer will send you a refund check.