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Evening Bat, Nycticeius humeralis

NYHU Anabat file recorded in Clay Co., FL  September 2008

Family—Vespertillionidae

Two subspecies -

             N.h. humeralis =

             N.h. subtropicalis =

NYHU

Echolocation: Most Anabat calls are distinct & easily recognized.  Some can be confused with  LABO or LASE ~35K, short & curvilinear, regular Fmin

Florida Distribution:  Peninsular FL

Roosting Behavior: Small colonies (20-100),, harems groups  Males sometimes solitary. Documented in buildings, bridges and culverts,. Often associated with TABR or EPFU   Also loose bark, cavity trees, beneath dead palm fronds.  Observed in abandoned RCW cavities in central FL (Finn unpublished) and radio-tracked to pines in Georgia.

Foraging Behavior: Captured in urban areas, swamps  pine forests. Small beetles, flies, bugs, plant hoppers, moths

Reproduction: Twins born late April to early May, sometimes triplets.  Juveniles volant in 3 - 4 weeks.

Management and Conservation Recommendations:  Although this bat is relatively common, it is poorly studied in the SE and little is known beyond maternity season.  Nycticeius were observed roosting in structures and bat houses during surveys in FL, GA & SC.  Diligent IPM practices that include the Installation of bat houses and roost mitigation and will help manage nuisance colonies.

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Urban Bat Status

Buildings
BatHouses

Yes

Yes

Status

FWS / USGS
Florida
FNAI
IUCN

none

Common / SNR

G5

LC

Description—Measurements

Mass g

FA mm

Wingspan

Total length

Tragus

Calcar

6.8 – 14

33 - 39

260 - 280

81-98

short, curved & rounded

not keeled

Brown, sometimes reddish.  Dark face, looks like small EPFU