||Survey reliability more info|
||Peak survey period|
||Potential survey period|
To ensure you follow the law - check whether your survey requires a permit. Always report any new records to the Natural Values Atlas, or send the information direct to the Threatened Species Section. Refer to the Activity Advice: Surveying page for backgroundinformation.
- In diseased areas, denning can occur at any time of year, although it is most likely to occur between July and December, and least likely during April.
- Remember! A den activity check is only of value if it is less likely to disturb breeding than a proposed activity.
- To survey for Tasmanian Devil maternal dens, search well-drained areas with burrowable soil or the potential for sheltered overhangs, especially cliffs, rocky outcrops, knolls, caves and earth banks. Den entrances are large enough to fit an adult Tasmanian devil. Wombat burrows and other ground cavities (e.g. left by fallen trees) may be used. Wood log piles may also be used.
- Maternal dens may have no detectable sign of activity (e.g. scats), so if in doubt, it is safest to assume that the den is active. Dens are not always in use, and activity could change from week to week.
- Cobwebs or vegetation across the entrance suggest a currently inactive den.
- Factors which can indicate that a den might be particularly significant (i.e. frequently used, or used by multiple individuals) include:
- indication of regular use in the form of fresh footprints or other signs;
- existing within a cluster of dens;
- few other potential dens within several square kilometres which is a typical home range for a devil.
- To detect current devil activity at a den – use of non-invasive methods such as remote cameras are recommended. Remote cameras can be inconspicuously placed such that they face all potential den entrances. To reliably detect maternal den use, the survey should take place over at least 7 consecutive nights. To minimise disturbance, place cameras during daylight hours and avoid approaching den entrances; if this is necessary, a single person should do so briefly, avoiding repetition, and minimising sound, especially sniffing.
- Please report confirmed Tasmanian Devil dens for recording on the Natural Values Atlas. Reports of dens of unknown species may also be stored in the Natural Values Atlas.