Consideration of detectability changes the order of abundance observed between species. A very detectable species like Hound Cestoni, frequently contacted on the ground but have the lowest population numbers in the Mediterranean area. Les Rhinolophes, very little detectable species, are less common than the records would have us seem.
Mawazo ya detectability mabadiliko ya utaratibu wa wingi aliona kati ya aina . aina detectable sana kama Hound Cestoni, mara kwa mara kuwasiliana juu ya ardhi lakini kuwa na idadi ya chini ya idadi ya watu katika eneo la Bahari . Les Rhinolophes, kidogo sana aina detectable, ni chini ya kawaida kuliko rekodi ingekuwa sisi wanaonekana .