The relationship between a white-winged dove and a saguaro cactus is mutualistic.
In this mutualistic relationship, both species benefit. The white-winged dove feeds on the fruit of the saguaro cactus, which provides nourishment for the dove. In return, as the dove eats the fruit, it helps to disperse the cactus seeds through its droppings. This aids in the reproduction and spread of the saguaro cactus. Mutualism is a critical interaction in ecosystems that fosters biodiversity and the survival of various species.