Equid mutualism is a term used to describe the mutually beneficial relationship between horses, zebras and other equids with other animals and plants in their ecosystem. Synonyms that can be used for equid mutualism include mutualism, symbiosis, cooperation, collaboration, interdependence, and reciprocity. These terms all refer to the concept of two or more organisms working together in a mutually beneficial relationship where both parties benefit from the arrangement. Equid mutualism is a crucial aspect of biodiversity and ecosystem resilience, as it promotes the health and survival of both the equids and the other organisms they interact with in their environment.