Pigeon flight photographic sprite

Original: "Bird-in-flight.gif", by Gadgetroid (7 February 2014).
Source: https://commons.wikimedia.org/wiki/File:Bird-in-flight.gif
Author: https://commons.wikimedia.org/wiki/User:Gadgetroid
License: Creative Commons Attribution-ShareAlike 3.0 Unported
https://creativecommons.org/licenses/by-sa/3.0/

Modifications: All 100 transparent photographic frames were tonally graded
to warm ivory, champagne highlights, and muted taupe feather shadows,
resized to 128 x 96 pixels, and arranged into a horizontal PNG sprite sheet.
The modified pigeon-flight.png is distributed under the same CC BY-SA 3.0
license. This license notice applies to this bird asset, not to unrelated
invitation artwork or the user-supplied soundtrack.