The sense of smell is used for finding food (usually flower nectar), and for finding mates (the female smelling the male's pheromones).
(The sense of smell; is used; for finding food (usually flower nectar), and for finding mates) (mates; smelling; the male's pheromones)
The sense of smell mates
is used smelling
for finding food (usually flower nectar), and for finding mates
the male's pheromones