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*Special Countries Membership:
Latin American and AOS Special Countries Membership: Assumes individduals selecting this category are members of ornithological socieites in any Latin American or Special Countries (see list of exclusions, below). The AOS offers memberships to individuals of many countries around the world at the discounted rate of $32 per year. Special Country memberships are not offered to residents of the United States, Canada, Israel, Japan, Australia, New Zealand, and the following Western European countries: Iceland, Norway, Sweden, Finland, Denmark, Germany, The Netherlands, Belgium, Luxembourg, France, the United Kingdom, Ireland, Switzerland, Austria, Italy, Spain, and Portugal.

**Companion/Guest Information:
Companions/guests of meeting registrants must register and have a badge. Companion registration fee provides admission to the welcome reception, plenary talks, and poster sessions. Companion registration DOES NOT include meals or paid events.

Refer to the membership category definitions on the AOS website for more information regarding the meeting registration categories.

Methods of payment accepted:
Credit Card through the registration portal. Check made out to American Ornithological Society (Checks must be drawn from US or Canada banking institutions), or by Wire Transfer (contact Crystal for instructions).

Receive discounted registration fees by becoming a member of the AOS.  Join Today.

Member registration rates are based on a 2019 AOS membership with an expiration date of 12/31/19 or greater.


  • Attendance at plenary, concurrent, and poster sessions
  • Program book with session listings and schedule
  • Evening networking events on Tuesday, Wednesday, Thursday, and Friday
  • Student and Early Professional networking events
  • All refreshment breaks

If you find it necessary to cancel your registration, we are able to refund your conference fee costs (less a $50.00 USD processing fee) if we receive notice on or before 18 March 2018. Refunds on registration fees will not be issued for cancellations received after 18 March 2019. Refunds will not be issued for “no-show” registrants for any reason. All refunds will be processed at the time of cancellation.

If you registered online, you can cancel your registration by emailing or contacting the AOS Executive Office at; 312-883-4645. If you do not receive a confirmation notification within 72-hours of submitting your request, please contact us to confirm receipt of your request.

Substitutions will not be made regardless of circumstance. Please cancel the registration and book a new registration.

Registration fees do not include accommodations. The conference organizers have reserved a block of rooms at very favorable rates at the Hilton El Conquistador. Please make your accommodation reservations early. More information, including the discount code to receive the AOS group rate on rooms, can be found on the
Accommodations page of the 2019 AOS Meeting website.

Cancellation of hotel reservations and other accommodations are subject to the specific policies and dates established by Hilton Hotels.

Volunteers are needed for a variety of important jobs throughout the entire meeting (presentation room support, registration desk, etc.). What better way to network and engage than to volunteer at the annual conference! This is a great opportunity for those who are seeking to build their CV.
Click here for more information on volunteering.

Volunteers will be able to enjoy a reduced registration cost to attend the conference. This opportunity is available to student members 18 and older and requires a minimum 12-hour commitment. If your are interested, please complete this short form. You will receive an email within 48-72 hours that includes a confirmation of your volunteer status and a discount code that you may use when registering for the meeting. Please do not register for the meeting prior to receiving your confirmation and volunteer discount code.

Merchandise and Swag
Merchandise order must be made through the Registration Portal by 18 March 2019.

Additional Information
Please read the AOS Meeting Terms & Conditions for registering for the conference.

If you have any questions or experience problems during the registration process, please contact Crystal Ruiz, AOS Administrator, at 312-883-4645, or Please include “2018 Conference Registration Help” in the subject line.