The northern yellow bat is larger than the southern yellow bat .
The northern yellow bat has an average body length of 14 cm , weight of 14 - 31 g , and wing span of 35 -- 41 cm .
The northern yellow bat is larger than the southern yellow bat , and has an average body length of 14 cm , weight of 14 - 31 g , and wing span of 35 -- 41 cm .