Bendigo research confirms fears, but proves boxes are not killing threatened species on hottest days.
As numbers of the regent honeyeater fall, the few remaining birds don't have other regent honeyeaters to learn their wooing song from.
The cost to agriculture and the environment from rising numbers of feral pigs and kangaroos has been highlighted.
In just a matter of months, the state-of-the-art wildlife hospital at One Mile has treated dozens of koalas - and a lizard - as teams work tirelessly to save injured native animals.
Nearly 200 threatened species are without recovery plans as the threat of extinction looms for many of Australia's iconic species.