 A sampled weight range of "V. regulus" from 3.6 to 7.0 grams gave a mean figure of 5.2 grams.They are highly energetic and can hunt their prey, insects, with great agility.Another bat of the genus, the little forest species "Vespadelus vulturnus", is also found in eastern regions, it is usually smaller, a forearm length of less than 31 mm, probably possesses a whitish tragus, a head has a pronounced brow.