A lifetime of sightings?  Anywhere in the world?  Yes.

Runs on Windows, MacOS and Linux?  Without emulation software?  Yes.

Easy-to-use?  Fast data entry?  Yes.

Fast import from eBird, Avisys, BirdBase, BirdTrack, and more?  Yes.

Birds, butterflies, reptiles, and more, around the world?  Yes.

Hundreds of built-in country and state checklists?  Yes.

Big price?  No.  It's free.

Scythebill is a desktop application for birders to keep track of their life lists and birding records. There's plenty of great birdlist software and birding software available today, but:

• Scythebill is free (and will remain so).
• Scythebill is easy-to-use. It takes a few minutes to get started, and just seconds to import a lifetime's eBird sightings.
• Scythebill is powerful - loads of features, like instantly flipping between the Clements and IOC checklists 
• Scythebill is cross-platform - you don't need to lose your list just because you switch from Mac to Windows to Linux.
• Scythebill is open-source, so anyone can contribute to its development.

New - Scythebill 17.0 is available!

Scythebill 17.0.0 includes the IOC 14.2 taxonomy and adds checklist printing, Birda imports, and a native "Apple silicon" version.

Other recent versions have added the IOC 14.2 taxonomy, checklist printing, multi-taxonomy spreadsheets, a native "Apple Silicon" version, extended taxonomy country checklists, iNaturalist import and export, Birda, Flickr, BirdTrack, HBW, Birder's Diary and Bird Brain imports, and much more!   See the Scythebill blog for all release notes.

Also new - more extended taxonomies!

There's new butterflies, mammals, reptiles, amphibians, and odonates of the world taxonomies (with country checklists!)  as well as taxonomies for European dragonflies and damselflies, North American moths, and three new taxonomies for United Kingdom invertebrates!