104 Aves Quiz

Settings icon made by Egor Rumyantsev. Licensed by CC 3.0 BY.

Bird icons made by Freepik. Licensed by CC 3.0 BY.

Android icon modified from Android with Arm Lifted (Plainicon) and Scarlet Macaw (Freepik). All licensed by CC 3.0 BY.

Bird images resized or processed using ImageMagick and GNU Parallel

O. Tange (2011): GNU Parallel - The Command-Line Power Tool,
;login: The USENIX Magazine, February 2011:42-47.