Shows more terrestrial hunting activity, particularly at night, having acute sight and hearing. Juveniles take crustaceans before moving onto larger, terrestrial prey. Larger adults have been reported to attack domestic animals and humans. Information concerning reproductive ecology is scarce. Nests can be found in both concealed and open locations.
Females remain close to the nests.
Once the eggs are ready to hatch, she will open the nest and assist in the hatching process. Hatching reported to occur between 42 and 90 days, coinciding with the beginning of the wet season. As many females often nest within close proximity, the number of hatchlings is one area can be high. This leads to safety in numbers. The skin of M. niger produces a shiny, black leather.