Members

Welcome to Membership Services!

Thank You for Your Support of the Cornell Lab of Ornithology!

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CONTACT US

Questions About Your Support
clomembership@cornell.edu
1-866-989-2473
Hours: Monday through Friday, 8 A.M.–4 P.M. Eastern Time

Questions About Birds
Visit Our Birds and Birding FAQ page

Our expert team is pleased to offer you the assistance you need as a supporter of the Lab. Please see our FAQs below. If you’d like to reach us directly, call 1-866-989-2473 Monday through Friday, 8 A.M.–4 P.M. Eastern Time, or email clomembership@cornell.edu and we will respond as soon as we can.

If you have a question about birds, please visit our birds and birding FAQ page.

Membership Benefits and Renewals

Tax Deductibility


  • Is my gift tax deductible?
    Donations and membership dues are fully tax deductible. The gift amount will appear on your official tax receipt, which you will receive by mail after you make your gift. Make a donation.
  • Will I receive a tax receipt for my gift?
    We will mail you a receipt approximately 4–6 weeks after we have processed your donation or membership dues. Members receive a member card showing their membership ID and expiration date with their receipt. Note: If you are a monthly donor, we will mail you just one receipt each January to reflect all of your donations received the previous calendar year.
  • What is the Lab’s tax ID number? Is the Lab a 501(c)3 nonprofit organization?
    The Cornell Lab of Ornithology is a 501(c)3 nonprofit organization, reliant on contributions from supporters. The tax ID number is Cornell University number 15-0532082.

Updating My Information

Participation in Lab Projects and Courses

For questions about logging in or participating in Lab projects and courses, please email the appropriate project team. See the list below or search our directory.

Questions About Birds

If you have a question about birds, please visit our birds and birding FAQ page. Once there, you can also use the search bar to look up any topic.

Other Questions

If you are a Lab supporter, please always feel free to call Membership Services at 1-866-989-2473 Monday through Friday, 8 A.M. to 4 P.M. Eastern Time, or email email clomembership@cornell.edu and we will respond as soon as we can.

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