Despite ~80 years of urban development at Hyams Beach Village, Jervis Bay, many specimens of the rare shrub Grevillea macleayana remain scattered throughout residential gardens. These garden plants are close (ranging from a few meters to several 100s of meters) to four stands of plants that occur in an adjacent national park bushland. Our research suggests that the garden plants are functioning as a component of the regional population, as pollen transfer (note the pollen on the pollen presenter of open flowers) -most likely by birds-links populations separated by ~2.5km. However, the gardens include plants that have been translocated from other parts of the species range, nursery propagated individuals and hybrids. Mating with these plants threatens bushland populations because of genetic contamination.