An Australian National University zoology student saved eight unborn choughs on this day in 1987.
The student alerted timber cutters from the City Parks section of the ACT Office that a couple of nests were perched on pine-tree branches in Haig Park.
The workers were about to start chopping down 116 trees as part of a reafforestation plan for the park when he told them.
The cutters immediately redirected their operation to other trees. ANU student Mr Robert Heinsohn had been studying the birds' mating habits. He had been observing the two nests between Limestone Avenue and Torrens Street for some time.
City Parks arboriculturist Mr Gary Richards announced the two trees would be removed from the felling schedule and would be allowed to stand for another year.
He said the City Parks made a special effort to preserve any trees which held nests.
This was good news for Mr Heinsohn as well as the choughs, as he was two years into his PhD on the birds.
White-winged Choughs are Australian natives, and are known for building large mud nests. The nests are set on horizontal branches, and will also be made of grass and feathers.
They have a complex social system and eat insects, and other small creatures. They are often seen in and around Mount Ainslie, Black Mountain, the ANU and the University of Canberra, as well as Civic.