If you're involved with Christmas or Breeding Bird Counts, the boundaries of your count circle are always of interest, and sometimes unclear. Count Circle includes the complete National Audubon database of CBCs, with a total of 2883 different count circles in 93 different states and territories including Canada, Mexico, the Caribbean, South America, and Antarctica (updated as of December 2018). Lookup and display any count circle on an interactive map, and find out exactly what is (and is not) included in the circle. The software also displays your current location, so you can determine precisely if you are inside or outside the count circle as you are doing your count.

You can also use Count Circle just to view the different circles, to help you decide which ones you might like to participate in. Display all the circles in your state with one click.

If you have reason to believe the database is in error, Count Circle lets you set the center of the circle, then update the database, and even, if you choose to do so, report the revision directly to National Audubon, who then review the update.

You can also create and save your own circles, and, combined with the ability to display multiple existing circles, this provides the perfect way to position a potential new circle so that it doesn't overlap existing circles. You can even choose the radius (in miles or kilometers) if you want to use something other than the "standard" 7.5 mile radius used for the CBC. A great addition for "patch challenges"!

Note: some reviewers have noted errors in the count circle locations. The data in the app is the latest data direct from the National Audubon Society. Any errors in location stem from that database, NOT from the app! This is precisely why the app includes a feature that lets you report such errors directly to Audubon, so that Audubon can correct such errors in future updates of their database.

Note: Notwithstanding the information in the previous paragraph, Count Circle is not affiliated with nor endorsed by the National Audubon Society. Christmas Bird Count is a trademark of the National Audubon Society.

What’s New

Version 1.8

Updated with 2018 count circle data from the National Audubon Society, now featuring 2883 different count circles in 93 different states, provinces, and countries.

Ratings and Reviews

3.5 out of 5
4 Ratings

4 Ratings

Mileybug ,

Okay For Quick Check

As I recall, at one point you could enter all the circles you’re involved with. Now it only allows entry on map of one circle at a time. Put in a 2nd one and 1st one disappears...or I’m missing something.

Former CBC compiler ,


I have been a CBC compiler for several counts and also served as a regional CBC editor, so I have a fair idea of what I want to know about a count circle, real or hypothetical. I'd give this app a solid B+. It uses a good map base, the new circles are easy to move around as needed and the existing database of counts is accurate, at least for states with which I am familiar.

What would I add or change? The biggest thing to add is that it needs to show a ghost image of all of the active circles on the map, so that if I want to establish a new circle, I can see where the other nearby circles are. For example, if I want to establish a circle at Waldport, Oregon, I need to avoid bumping into either Newport to the north or Florence to the south. Right now I have to call them up, look at them, remember where the edge is, close that circle and then fiddle with my new boundaries.

The database should be updated each year around November 1, because many states add new circles each year, or drop old ones. Oregon is adding three circles for the 2013 CBC, but they are not in the CC database yet so even if I could see all the state's circles, I might still bump into one because it hasn't been loaded. Since National Audubon adds these new circles to its database in the fall, before the counts happen, CC should be able to download them for an annual update.

The new circle function is a godsend to anyone who wants to make a new circle, because you can keep moving it around til you like it. You don't have to fiddle with new coordinates in Google Earth, or pen-on-mylar. A couple of times I made a new circle and it "stuck" to the map even when I wanted to get rid of it. I had to restart the phone to clear the dead circle. But in general, it works well.

I have noticed a couple of circles that clearly have misplaced centers. I suspect that this is due to goobered numbers in the NAS database rather than anything CC did, but these things need to be fixed by someone somewhere. One nice thing about the CC map is that it is very easy to "proof" where your circle really is, so you can figure out if the location in the database is right. I encourage all compilers to do this.

All in all, a really good start on an app useful to the birding community. I look forward to future versions.

slackyhipster ,

Great for the 5MR Challenge!

If you’re doing the 5MR (five mile radius) local patch challenge, you need this app.

Easy as pie to set up your circle, and you’re off!


Stevens Creek Software LLC
5.4 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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