A male Red goshawk in the Cape York Peninsula. Credit: JJ Harrison (CC BY-SA 3.0)
Australia’s rarest bird of victim — the red goshawk (Erythrotriorchis radiatus) — is dealing with termination, with Cape York Peninsula now the only location in Queensland understood to support breeding populations.
PhD prospect Chris MacColl from The University of Queensland’s School of Earth and Environmental Sciences led the research study task that made the discovery and was shocked by the hawk’s diminishing numbers.
“Over four decades the red goshawk has lost a third of its historical range, which is the area that it’s previously been known to occupy,” Mr. MacColl said.
“It’s barely hanging on in another 30 percent of regions it has previously been known to inhabit.”
Researchers evaluated 40 years of sightings by resident researchers to discover worrying population patterns. Credit: Chris McColl
Mr. MacColl said the species is now considered extinct in New South Wales and the southern half of Queensland.
“There has been a noticeable decline in North Queensland too, leaving Cape York Peninsula as the last place in the state still known to support breeding populations,” Mr. MacColl said.
“The Top End, Tiwi Islands, and Kimberley are the red goshawk’s last remaining stronghold, making northern Australia critical to its ongoing survival.”
The unique bird of prey has long captivated bird watchers, with its striking reddish-brown plumage, deeply fingered wing tips, heavy yellow legs, and oversized talons.
A male Red Goshawk (Erythrotriorchis radiatus) in flight in , Cape York Peninsula, Queensland. Credit: Summerdrought (CC BY-SA 3.0)
The research team analyzed four decades of sightings by citizen scientists to uncover the concerning population trends.
“The threats driving the red goshawk’s decline require further investigation, but we believe habitat loss and degradation have played a key role,” Mr. MacColl said.
Study co-author Professor James Watson said the dramatic loss of the species means governments and communities need to be proactive in conserving remaining habitats.
A female Red goshawk in the Cape York Peninsula. Credit: JJ Harrison (CC BY-SA 3.0)
“An increase in agricultural, mining, and gas projects across northern Australia pose a real risk to a species like this, given what we’ve observed throughout its eastern range,” Professor Watson said.
“Northern Australia supports the largest intact tropical savanna ecosystem in the world and hosts an abundance of biodiversity. Conservation efforts aimed at securing an emblematic species like the red goshawk in these areas will benefit many other species given the species is a top predator.”
The study authors back calls for the Commonwealth Government to amend the red goshawk’s national conservation status from Vulnerable to Endangered, so the bird can be afforded greater conservation priority.
The research is published in the journal Emu – Austral Ornithology.
Reference: “Rapid and recent range collapse of Australia’s Red Goshawk Erythrotriorchis radiatus” by Christopher MacColl, Nicholas P. Leseberg, Richard Seaton, Stephen A. Murphy and James E.M. Watson, 19 February 2023, Emu – Austral Ornithology.
DOI: 10.1080/01584197.2023.2172735
The research was funded by Rio Tinto and supported by the Queensland Department of Environment and Sciences (DES) and the Australian Wildlife Conservancy (AWC).
