The IOU offers different membership options

You can join the IOU for an annual membership fee and benefit from all our membership services. You may also wish to support our mission and programs through donations.

By joining you will have access to:

Service Details  
IOU member forum Read, inform, discuss in our IOU member forum. Learn about and discuss specific topics within our Working Groups.  
IOU member list All users of the IOU webpage with an active membership are provided with the option to maintain a user profile page and are therefore free to distribute e.g. their contact details, webpage, areas of interest etc. All active members are allowed to see such profiles.   

IOU "sound dictionary"

Did you ever wonder how to pronounce bird names? Our active members can find the list of scientific bird names which are currently in the database of the IOU as a sound dictionary. Please feel free to search for a genus or species names an listen to the pronunciation of it via audio file playback.  

IOCongress fee

Registered and active IOU members have discounted IOCongress registration fees.   
International Network An international network of ornithologists and avian biologists.  
IOU members contact Access to IOU members contact information.  
Networking Effective collaborations through IOU networks.  
Information Information exchange with other ornithologists and avian biologists.  
Vacancies Announcements regarding positions (both paid and volunteer), fellowships, university programs, and other opportunities.  

Registration first!

Please note: Before buying a membership you have to register first. When you submit your registration form - in case of an application for reduced fee option with appropriate documents - it will be sent to our union team to approve. You should receive confirmation of your registration as soon, but if you have any questions before that please email

IOU membership plans