Couple's 5-Decade Bird Count Saves Species

Arthur and Margaret Thorsborne's deep connection with North Queensland began with a camping trip in 1964. Captivated by Hinchinbrook Island, they eventually settled and became fervent conservationists. Their involvement extended to the pied imperial-pigeon, a species whose population was dwindling when they began their efforts.

Starting in 1965, the Thorsbornes initiated annual counts of the pied imperial-pigeon breeding colony on North Brook Island. This consistent monitoring, spanning five decades, created an invaluable long-term record. The data captured significant population fluctuations, including a sharp decline after Cyclone Yasi in 2011, followed by a gradual recovery.

Their extensive observations revealed a substantial increase in the pied imperial-pigeon population, ultimately reaching over 40,000 birds. While not solely responsible for the growth, the Thorsbornes' decades-long data provided a critical baseline for understanding the species' resilience and vulnerability. Their story highlights the profound impact of dedicated local participation in wildlife conservation.