BULLETIN FLORIDA STATE MUSEUM


SLOW-FLYING HAWKING INSECTIVORE GUILD
 Female Pteronotus parnellii are monestrous (Fig. 15). Pregnancies
 occur from late December through mid-April. Lactation proceeds from
 mid-March through late October; however, most young bats are
 weaned by mid-July. The percentage of females sucking young in the
 May-July sampling indicates that at least 53 percent of the adult
 females succeed in raising young to the latter stages of nursing. This
 figure is actually larger, because some females already had weaned
 young by the end of this sampling period. Unfortunately juvenile P.
 parnellii were not distinguished from adults in the field.
 During the March-May sampling 16% of the captured females were
nulliparous adults, and these were probably all one-year-olds.


 Pteronotus parnellii

 ] Nulliparous 99
 S T? that have given birth
 80-
 60-
 40-
 20 few data few data
 0 
 100- [ Pregnant

 V 90- Lactating

S80 Nonreproducing

7. 0-

S60
0
Z 50-

L 40


 J-M M-M M-J J-S S-N N-J
 N=10 52 32 21 19 5

FI(URE: 15.-Reproductive timing in female Pteronotus parnellii.


Vol. 24, No. 4