About BirdTable
BirdTable is the yard-bird companion: identify the visitor at your feeder by field marks and song, then learn exactly what keeps it coming back.
BirdTable exists because backyard birding starts with "what was that?" and the field guides answer for forests, not feeders. Twenty familiar species, each with the ID marks, the song hint, and the feeding preferences that turn a yard into a habit.
BirdTable is organized so you can browse by collection or jump straight to an entry. Each entry keeps to the same shape — the facts at a glance, then the plain-language detail — so comparing two entries takes seconds, not tab-juggling.
The project is independent and ad-supported. We are not affiliated with any brand, agency, or organization whose work we reference. Corrections and suggestions are genuinely welcome via the contact page.
What makes BirdTable different
- Your numbers never leave your browser. Every calculator on BirdTable runs entirely on your device. We never see, store, or transmit the figures you enter — there are no accounts and no server-side processing of your inputs.
- Published methodology. Each calculator page explains the exact formula it uses and the assumptions behind it, so you can check our work or reproduce it in a spreadsheet.
- Free, forever, without a paywall. BirdTable is supported by advertising. There is no premium tier, no email gate, and no upsell.
Independence
BirdTable is an independent educational project. We are not affiliated with, endorsed by, or acting on behalf of any government agency, lender, insurer, or the organizations whose formulas and public data we reference (such as published field guides and reference literature). All trademarks and referenced standards belong to their respective owners.
Questions, corrections, or suggestions are genuinely welcome — get in touch.