Miller’s mastiff bat lives in open areas, mainly in grassland habitats. They have also been observed to build their roosts in caves, dry woodlands, roof dwellings, and thorn scrub. They tend to live in areas by a river, lake, or watering hole. Water is important for drinking and foraging behaviors. They are nocturnal, and start to become active at dusk, which coincides with the time when their food source becomes active. They tend to fly in a single file line to their destination. Their main food source are insects, such as beetles and moths.
