Thayer Birding Software
20th Anniversary!
GBNA v4.5
Fellow Bird Lovers:

Celebrate and Save!

Did you know that Thayer Birding Software was first publicly introduced at an ABA Convention on June 17, 1994? Pete Thayer initially created the program as an educational tool for teachers and students. Due to high interest of birders of all levels outside the classroom, he made it available to the public soon after.

In honor of the 20th anniversary, for today only, Thayer Birding Software and are offering these special deals to our friends, fans, and followers:

Download the software for just $20!
The standard Guide to Birds of North America v4.5 is now available for download (Windows only). Get it instantly, AND save almost $40! Mac users, you can still buy v4.5 at with the discount below.

Save 20% on your order at!
Orders placed by midnight on 6/17 using this code will enjoy 20% off their order. Excludes optics. Buy a hard copy of Thayer Birding Software, or take advantage of the discount to snag a gift or stock up on books for your own birding library! The Thayer software is already 20% off, so you'll enjoy an additional 20% off any TBS title with this coupon!
We hope you'll join us in congratulating Pete and Thayer Birding Software on 20 years of educating and assisting birders, researchers, and students across the country...and enjoy some big savings!
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