Bats, as formerly shown, probably acquired their wings by at first gliding through the air from tree to tree, like the so-called flying squirrels, for the sake of escaping from their enemies, or for avoiding falls;
Saguzarrek, lehen azaldu bezala, urtxintxa hegalariak deritzenen antzera, etsaiei ihes egiteko edo lurrera ez erortzeko zuhaitzetik zuhaitzera airetik zehar irristatuz erdietsi zituzten seguraski hegoak;