Forelius mccooki workers taking nectar from a Cholla cactus in the Sonoran desert. Cacti provide nectar to attract ants, as some ant species help the plant by removing herbivorous insects. Tucson, Arizona, USA
A carpenter ant visits an extrafloral nectary on a leaf stem of an invasive Melia azederach tree. Austin, Texas, USA.
Bicolored pennant ant workers gather nectar from glands of an invasive mallow. Some plants use nectar to attract ants as a defense against herbivorous insects, as ants also eat insect eggs and caterpillars. Orlando, Florida, USA
