
In development · Designed in Colorado
Every bird at your feeder, named.
A small camera that lives inside your window, names each bird that visits the feeder you already have, and keeps your list.

American GoldfinchSpinus tristis · first seen todayExample view
It watches the feeder you already have.
Stick it inside the glass, plug it in, and drag a box around your feeder on your phone. It doesn't need to face the feeder head-on.
It names every bird that lands.
The box does the identifying itself, from about 500 North American species, checked against what lives near you. A blurry glimpse is marked unsure.
And it keeps the list for you.
One stay at the feeder is one visit. The first time a new kind shows up, after more than one clear look, it gets a card of its own.
Set up in three steps. All indoors.
No ladder · No batteries · No app store- 01
Stick it to the glass
Suction cups hold it inside the window and it plugs into the wall. A bottom corner works.
- 02
Show it your feeder
Open Windowfinch in your phone or tablet browser and drag a box around the feeder.
- 03
Watch your list grow
Every visitor gets a name. A new kind gets a card of its own.
About 500 North American species. Only the ones that live near you count, so a feeder in Colorado is never told it has a Florida bird.
61 birds live near you. Four found so far.
Birders call it a life list: every kind you've ever seen. Windowfinch keeps yours, with the day each one first showed up and how often it comes back.
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PL. 01 
Black-capped Chickadee
Poecile atricapillus
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PL. 02 
House Finch
Haemorhous mexicanus
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PL. 03 
Dark-eyed Junco
Junco hyemalis
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PL. 04 
American Goldfinch
Spinus tristis
Not seen yet
Why it lives inside the window
Your photos stay in your house. The box names every bird itself, says when it isn't sure, and never sends your yard to a cloud.
- Keep your feederNothing new to buy, fill or hang.
- Nothing to chargeWarm, dry and on wall power.
- No app to installOpens in your browser on home Wi-Fi.
- Honest about doubtUnsure sightings are marked unsure.
Where it stands today.
Windowfinch is being built in Colorado. Here is exactly what exists and what doesn't.
We'll publish how often it names birds correctly once we've measured it at real feeders. Until then, no number.
Built so far
- Software that names about 500 North American species.
- One stay at the feeder counts as one visit.
- Everything runs on the box, with no cloud service.
- A list you open on a phone or tablet over home Wi-Fi.
Still to do
- Testing at real feeders, through real windows, in every kind of light.
- The case and the window mount.
- The price and the launch date.
Questions.
Does it really work through glass?
That's what it's built for. The lens sits against the glass with a hood against room reflections. A window screen in the way will blur the picture.
How far away can my feeder be?
We're designing for about 10 feet from the window, and will confirm it after testing.
Do I need a special feeder?
No. Any feeder the camera can see from the window.
Do I have to install an app?
No. It opens in your phone or tablet's browser on home Wi-Fi.
When can I buy one, and what will it cost?
Not yet, and the price isn't set. Join the list and you'll be the first to hear.
Be the first to know.
Leave your email and we'll tell you when Windowfinch is ready to stick on a window. Only about Windowfinch.
