A btr file extension is related to the AviSys bird watcher database format.
There are 2 other file types using
the BTR file extension!
.btr - Btrieve database
.btr - Microsoft FrontPage related data
Detailed description
Software that open btr file
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What is btr file? How to open btr files?
The btr file extension is used by the AviSys, the birding software for bird watchers, developed Jerry Blinn.
Most likely some old format without support. No further information could be found.
This btr file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
The default software associated to open btr file:
AviSys 
Company or developer:
Jerry Blinn
AviSys is birding software for Microsoft Windows.
Help how to open:
This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.
How to convert:
As far as we know, this .btr file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
List of software applications associated to the .btr file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open btr file, edit btr file, convert btr file, view btr file, play btr file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting btr files.
Software that open btr file - AviSys bird watcher database
Programs supporting the exension btr on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about AviSys for open btr file action.
btr file editor and apps that can edit btr file - AviSys bird watcher database
Programs supporting the exension btr on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about AviSys for edit btr file action.
Programs that can create btr file - AviSys bird watcher database
Programs supporting the exension btr on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about AviSys for create btr file action.
Unspecified and all other actions for computer programs working with btr file - AviSys bird watcher database
Click on the software link for more information about AviSys. AviSys uses btr file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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