The Vertebrate Fauna of Jenolan Karst Conservation Reserve: Final
The Vertebrate Fauna of Jenolan Karst Conservation Reserve: Final
The Vertebrate Fauna of Jenolan Karst Conservation Reserve: Final
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
have specific information on location presented here for completeness and future reference. All fauna<br />
records collected during the targeted and opportunistic survey techniques were entered into the BSS<br />
<strong>of</strong> the Atlas <strong>of</strong> NSW Wildlife.<br />
Cave Inspections<br />
Target Species: Cave-dwelling bats particularly the eastern bentwing-bat, eastern horseshoe bat and<br />
large-eared pied bat.<br />
Technique: This project aimed to gain an understanding <strong>of</strong> the current occupation <strong>of</strong> the cave system<br />
by insectivorous bats. Due to the limited time available for field survey, a comprehensive survey <strong>of</strong> all<br />
caves was not attempted. Instead, a sub-set <strong>of</strong> caves was chosen based on a literature review and<br />
discussions with staff from the <strong>Jenolan</strong> Caves Trust, <strong>Karst</strong> and Geodiversity Unit and Kanangra Area,<br />
Andy Spate, Julia James, Anne Musser and Ian Eddison. Caves that previously had bats seen within<br />
them, or were considered to hold potential as bat roosting sites, were selected for inspection.<br />
Caves inspected included Mammoth, Teardrop, <strong>The</strong> Devil’s Coach House, Arch, Nettle and Paradox<br />
Caves (for a full list <strong>of</strong> caves visited see Appendix B). During each inspection the cave was searched<br />
with LED torches (assisted with binoculars) for roosting bats. Caves were also searched for guano<br />
deposits, bat odour and staining. Anabat recording was used within caves, however as bats adjust<br />
their calls based on their environment the calls collected inside the caves were not comparable to<br />
reference calls <strong>of</strong> free-flying bats.<br />
Bats were captured by hand using a small scoop net and transferred to cloth bags prior to processing<br />
(in accordance with the protocol approved under the OEH Animal Care and Ethics Committee Animal<br />
Research Authority ARA001204/04). Care was taken not to disturb the major clusters <strong>of</strong> bats.<br />
Captured bats were held for a short period <strong>of</strong> time prior to release. Bats were aged and reproductive<br />
condition assessed using methods described in Parnaby (1992a). Additional notes were taken on fur<br />
colour and wing integrity and bats were checked for identification bands. Colony size was estimated<br />
by counting subsets <strong>of</strong> bats in small areas and extrapolating to estimate the total.<br />
Fly-out Counts<br />
Target Species: Cave-dwelling bats<br />
particularly the eastern bentwing-bat,<br />
eastern horseshoe bat and large-eared pied<br />
bat.<br />
Technique: This consisted <strong>of</strong> an observer<br />
sitting near a cave entrance at dusk with an<br />
Anabat SD1 detector. <strong>The</strong> number <strong>of</strong> bats<br />
leaving the cave was counted until activity<br />
diminished, at this point in time bats had<br />
started returning to the cave. Fly-out counts<br />
done in this manner provide a coarse<br />
estimate <strong>of</strong> colony size.<br />
Anabat Recording at Cave Entrances<br />
Target Species: Cave-dwelling bats<br />
particularly the eastern bentwing-bat,<br />
eastern horseshoe bat and large-eared pied<br />
bat.<br />
Technique: Targeted ultrasonic recordings were made at cave entrances. Detectors were set facing or<br />
inside cave entrances. During analysis, the time <strong>of</strong> exit was noted and compared with the sunset time.<br />
Bats recorded immediately following dusk were assumed to be roosting in the targeted cave (or<br />
nearby). Recorded calls <strong>of</strong> eastern bentwing-bats, in particular were atypical for this species, being a<br />
broader spectrum call (N. Williams pers. comm.). Broader spectrum calls are probably used in<br />
confined environments such as caves (or are the result <strong>of</strong> artefacts <strong>of</strong> the recording environment e.g.<br />
echoes).<br />
Sooty Owl Pellet Collection<br />
Target Species: Sooty owls and small mammals that are typical prey <strong>of</strong> this owl.<br />
Technique: Sooty owl pellets were collected from Arch Cave, Nettle Cave and <strong>The</strong> Ballroom. Sooty<br />
owl pellet deposits have been accumulating in the <strong>Jenolan</strong> Caves system for thousands <strong>of</strong> years; only<br />
contemporary deposits were collected during the BSP project, with fossil and sub-fossil deposits left<br />
16<br />
Fly-out counts were conducted at known bat roosts. Photo © B.<br />
Hope/OEH<br />
<strong>The</strong> <strong>Vertebrate</strong> <strong>Fauna</strong> <strong>of</strong> <strong>Jenolan</strong> <strong>Karst</strong> <strong>Conservation</strong> <strong>Reserve</strong>