Mature eucalypt trees provide a range of habitat features for native wildlife, as well as bringing natural beauty to urban landscapes. A PhD candidate at the ANU Fenner School is conducting research to find ways that will reduce the risk mature eucalypts pose to people and infrastructure in urban environments. One part of this study will calculate how many potentially dangerous branches are dropped by mature eucalypts over the period of a year. We will combine this information with data on pedestrian traffic in different parts of the urban environment to estimate the risk posed by mature eucalypts in different locations. To gather as much data as possible from across the east coast of Australia, we are asking for your help as a citizen scientist.