Ants and Blues: The Feeling is Mutual 

The caterpillars of some butterfly species in the family Lycaenidae associate with ants in mostly mutualistic relationships, where ants receive a sugary reward from the caterpillars, and in return the caterpillars get protection against predators. This video describes the relationship between ants and the Miami blue, a critically endangered butterfly found only in the Florida Keys.
Entered into the Entomological Society of America's 2019 RU-vid Your Entomology Contest.
Producers: Geena M. Hill, Chris A. Johns, Simon McClung, and Jaret Daniels