What are two organisms that illustrate mutualism the desert biome?

An example of mutualism in a desert biome is the desert is the relationship between Saguaro cacti and the Gila woodpecker. This bird finds food like parasites and insects on the cactus. It also nests on cacti. While the cacti provide food and shelter for this bird, the bird in turn helps cacti when it spreads pollen to other cacti. Mutualism refers to a relationship in which both parties benefit from their interaction.