The abundance of organisms (including bats) varies greatly between species but also within the same species, group sizes ranging sometimes solitary individuals to aggregations million individuals, they are often unevenly distributed across seemingly suitable habitat.
wingi wa viumbe (ikiwa ni pamoja na popo) inatofautiana sana kati ya aina lakini pia ndani ya aina hiyo, ukubwa kundi kuanzia watu binafsi wakati mwingine faragha kwa aggregations milioni watu, wao ni mara nyingi unevenly kusambazwa katika inaonekana kufaa makazi.