This tendency was particularly true for bats on islands like Sardinia (Mucedda et al . 2002), the Azores (Willow et al . 2004; Willow et al . 2007) and Corsica (Castella et al . 2000), but has also been shown in recent years on the continent (Ibañez et al . 2006; Mayer et al . 2007).
Tabia hii ilikuwa kweli hasa kwa ajili ya popo katika visiwa kama Sardinia (Mucedda et al. 2002), les Açores (Willow et al. 2004; Willow et al. 2007) na Corsica (Castella et al. 2000), lakini pia imekuwa inavyoonekana katika miaka ya hivi karibuni katika bara (Ibáñez et al. 2006; Mayer et al. 2007).