 Those strong enough to enter through the top of the flower include the digger bee species "Anthophora terminalis" and the bumblebee species "Bombus fervidus", "Bombus griseocollis", and "Bombus impatiens".The eastern carpenter bee ("Xylocopa virginica") chews a narrow slit at the base of the flower and "steals" nectar without pollinating the plant, a behavior known as nectar robbing.The holes in the petals created by this species allow smaller insects to also access the nectar and pollen, including the honeybee ("Apis mellifera"), the green sweat bee species "Augochlorella aurata" and "Augochlorella persimilis", and the eastern masked bee ("Hylaeus affinis").