Red crackers are a medium-sized brush-footed butterfly, species of the genus Hamadryas. Their common name is due to the unusual way that males produce a "cracking" sound as part of their territorial displays. This genus of butterflies are found throughout South America to Arizona, and at least nine species can be found in Costa Rica. See wikipedia.org/wiki/Hamadryas_(butterfly
https://flic.kr/p/n8uTR | Bwindi Butterfly- Protogoniomorpha temora | Photographed in the Bwindi Impenetrable Forest Uganda which has a myriad butterflies and birds as well as Mountain Gorillas. If you know the name of this butterfly I would appreciate you letting me know. Edit: thanks Gerry for the I.D.