Farther south lesser long-nosed bats occur at high elevations on wooded mountains. Migrate south in the fall and return in the spring. Little is known about reproduction. Females have a single young per litter. Young begin flying at about 4 weeks.
Bats are nocturnal creatures which forage at night on nectar and pollen.
The nectar and pollen is especially provided by flowers of paniculate agaves and large cacti. The plants depend on the bat for reproduction and the bat depends on the plants for food. This cooperative relationship is called mutualism. Habitat distubance and destruction which is the result of human development, agriculture, deforestation, and livestock grazing.