Melbourne's urban forest plays an important role in supporting biodiversity in our city. As trees age, they can develop hollows and cracks that provide shelter for a range of animals, including birds and bats.

We know that tree hollows are important, but we have limited data about which trees have hollows and how they are distributed throughout the City of Melbourne. That's why we need your help!

Citizen Foresters are invited to help us build our database of trees with hollows. We'll be visiting parks and streets to look closely at the trees and record information about hollows. This data will help to inform the way that we manage trees and plan for habitat in the future.

There are almost 80,000 trees throughout the City of Melbourne, so we will be collecting tree hollow data at lots of events over the next couple of years. This means there will be plenty of opportunities for you to get involved!

Citizen Foresters are invited to participate in a 2 hour data collection event. Working in small groups, Citizen Foresters will move through the park assessing individual trees and recording data about any hollows present.

Please note that no previous knowledge is required: training will be provided on the day.

Data collection events will be taking place throughout winter at various parks throughout the City of Melbourne. At this time of year deciduous trees have no leaves, making it easier to view any hollows on the branches or trunk.

The following data collection events are available for Citizen Foresters to join:

  • Friday 21 June, 2:00pm to 4:00pm, Fawkner Park
  • Saturday 6 July, 10:00am to 12:00pm, Fawkner Park

The meeting point for these activities is the lawn next to the Fawkner Park Tennis Club car park, next to Toorak Road.

Google maps link

To join us at a data collection day click the Register button below and select a time.

Please note that in order to participate in this activity, you must be a registered Citizen Forester.

Sign up to become a Citizen Forester.


Register for an upcoming data collection event.


Data collection event completed in Royal Park

March, 2018

30 Citizen Foresters came out to help us record habitat trees in Royal Park on the 23rd of March. There were so many trees that it was a slow-moving process, but it was exciting to see so much habitat potential in some of the older gum trees. Volunteers also became quite good at using the specialist equipment, including the DBH tapes and laser rangefinders!

Trial data collection event complete!

June 2016

Thanks to everyone who came out to help us identify habitat trees in Fitzroy Gardens! It was a rainy day but we still had about 30 enthusiastic Citizen Foresters who helped us to test the method for identifying trees with high habitat value.

The results have been analysed to create a map showing the trees that were found to have high habitat value.

In addition to collecting data, the Citizen Foresters provided feedback about the data collection method. This input will be used to refine the approach before habitat Tree Identification is carried out more broadly across the City of Melbourne.