The species is predominantly granivorous and forages on the ground. Ord's kangaroo rats are primarily granivorous and herbivorous. The double-barred finch is granivorous and highly gregarious. This removal of vegetation also keeps down the number of granivorous rodents down. Their rounded conical bills suit their granivorous diet. The medium-sized seeds may be dispersed by rodents and granivorous birds and running water. Pigeons are naturally granivorous, eating seeds that fit down their gullet. Golden mice are granivorous and eat mostly seeds. The northern cardinal is mainly granivorous, but also feeds on insects and fruit. Sparrows are granivorous, but also consume small insects. Adults are mainly granivorous but diet preference varies with bill size and food availability. Rock firefinches are tropical granivorous birds, eating mostly seeds on the ground for their diet. The diet of Merriam's kangaroo rat is almost exclusively plant seeds (they are granivorous). White-winged doves are granivorous, feeding on a variety of seeds, grains, and fruits.