Credits & licenses

Last updated 1 October 2026

LiferList is built on open bird, map and software data. Questions about any of it? Write to contact@lifer-list.com.

Bird names and taxonomy

AviList Core Team. 2026. AviList: The Global Avian Checklist, v2025b. https://doi.org/10.2173/avilist.v2025b

AviList: The Global Avian Checklist © 2026 by AviList Core Team is licensed under CC BY 4.0.

LiferList applies its own counting rules and doesn't use every field; provided as-is, without warranties.

Species text

Excerpts from Wikipedia, under CC BY-SA 4.0; each species page names and links its article.

Species images

Wikimedia Commons and iNaturalist contributors, each under its own license, credited under each image with its title, author, license and source.

Country and subdivision names

Unicode CLDR (cldr.unicode.org), © Unicode, Inc., under the Unicode License v3.

Place lookup

Natural Earth (public domain) and U.S. Census Bureau boundaries (public domain).

Video and audio processing

FFmpeg (ffmpeg.org), under the LGPL v3, run on our servers; libvips (libvips.org), under the LGPL v3 (the exact license its npm package declares, LGPL-3.0-or-later), run on our servers via sharp.

Open-source software this app uses

LiferList's web app is itself built from many open-source packages. See the full list of open-source packages and their licenses.

LiferList isn't affiliated with eBird, the Cornell Lab of Ornithology or AviList.