FauNature - Bringing You and Wildlife Together

Tree Hollows - Habitat Creation

Old growth trees containing natural hollows are now rare many urban and rural environments, yet they are esential for over 300 native animal species.  Natural hollows are better than nesting boxes or artificial hollows for native wildlife to shelter and/or nest in, however hatitat augmentation my be invaluable where hollows are in short supply.

Habitat trees are often condemed as a potential danger to life as well as property, so are removed.  To retain these important components of the landscape, to benefit native wildlife, the risk associated with these trees need to be migitaged.

Traditionally nesting boxes have been used to augment natural hollows, however in the last few year arborists have been looking into how they may be able to assist in this process.  Retaining habitat trees, while minimising the associated risks is has been one of the principle drivers.  A number of workshop have been run to raise awareness of this issue, across South Australia, Victoria and Queensland - including TreeNet, City of Hume, Aurby Council/Woodonga Tafe College and World Arbor Camp.

The workshop and associated presentations were developed by Phil Kenyon (arborist - Kenyon's Quality Tree Care), Pat Kenyon (arborist - Tree Tactics) and James Smith (zoologist - fauNature).  The written material delivered at these workshops are included below...

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Tree and Habitat Creation Workshop - Hollow Dependent Wildlife.  Presented at World Arbor Camp July 2011.  Written by James Smith - Copyright fauNature 2011.

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Habitat Creation Workshop.  Presented at TreeNet Sept 2010 and repeated at World Arbor Camp July 2011.  Written by Phil Kenyon and Pat Kenyon - Copyright  2010.

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Natural hollows can be successful used regardless of the entrance orientation.  With nest boxes and artificial hollows however, it is better to follow rules to protect the occupants from the hot north, north-westerly sun and the prevailing wind and rain.  This document recommends the best what to orient an nest box or an artificial hollow across southern Australia.

Below is a spreadsheet which details the dimensions required for many of the more common hollow nesting groups or species.  This has been constructed primarily for arborists, with the hollow dimension complexity reduced and grouped to simplify the process/creation...

Hollow Dimensions

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