I would guess it's due to the fact that not all bats live in low light
conditions (think: many species of fruit bats that spend their lives in trees).
Mammalian evolution takes longer than it does for invertebrates: the time
between generations is much longer.
Diana
* * * * * * * * * * * * *
FYI, cool deals on used/discounted gear are available in garage sales
starting Sunday morning, Jan. 4, at all Texas REI (Recreational Equipment Inc.)
stores. These are usually popular, so get there early ...
Sent from my smart phone
___
Texascavers
