STORY

Queensland’s fossil giants: dinosaurs, sea monsters and megafauna on the road

Dinosaurs, marine reptiles and giant marsupials stand beside roads across Queensland. Their sculptures lead back to remarkable fossil discoveries, ancient seas and scientific questions that are still being answered.
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By Project Big Things Editorial
Updated 20 October 2026 · Facts checked 20 October 2026
AI assistance: AI tools assisted with research and drafting. The Editor reviewed, verified and approved the article. How we work
Most roadside giants work by inflation: the banana, the prawn, the merino. Queensland’s fossil-themed Big Things are different. Some are built at roughly the size of the animals they depict, animals that were already astonishing; others are sculptures inspired by fossils. At Muttaburra, Richmond and Eulo, the subject is rooted in discoveries from the surrounding district.[1][2][3]
A replica is a reconstruction, often assembled from partial skeletons and scientific interpretation. Where the science changes, the sculpture may preserve an older idea of the animal.

The five places

  • •
    Muttaburra: Muttaburrasaurus, a plant-eating dinosaur named for the town. A statue stands in the park, and an Interpretation Centre holds replicas of the original bones.[4][5]
  • •
    Hughenden: two more Muttaburrasaurus, Hughie the skeleton and Mutt the full-bodied model, plus an ammonite sculpture made from windmill parts.[6][7][8]
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    Richmond: a full-size Kronosaurus outside Kronosaurus Korner, a museum of marine reptiles.[2]
  • •
    Eulo: a bronze of Kenny, a Diprotodon, the giant marsupial whose bones were preserved in ancient mud springs near the town.[3][9][10]
  • •
    Chillagoe: a roadside elasmosaur called Dave, built by a community group for the entrance to town.[11][12]

Why a cattle town has a sea monster

The marine reptiles and the dinosaur belong to the Cretaceous, when inland Queensland was under water; the Diprotodon is far younger, a giant marsupial of the Pleistocene, in the Quaternary Period. The Queensland Museum describes the Cretaceous as a time when "much of Queensland was covered in a vast, shallow sea", called the Eromanga Sea.[13] A 2026 peer-reviewed study describes it as an epeiric sea that, during all of the Early Cretaceous and possibly into the Late Cretaceous, covered much of central eastern Australia.[14] The museum at Richmond describes its collection as 100 to 115 million year old remains of extinct marine reptiles from the ancient inland sea.[2]
That is why dry cattle country now gives up marine reptiles.

Muttaburra and Hughenden: the dinosaur named for a town

In 1963 a local grazier, Doug Langdon, found the bones of a dinosaur while mustering cattle, according to the Queensland Government.[1] The site was near the Thomson River at Muttaburra.[4] Queensland Museum palaeontologists Alan Bartholomai and Ralph Molnar named the animal Muttaburrasaurus langdoni in 1981, and the name honours both the town and its finder.[15][1]
Its significance is often put more strongly than the sources allow, so here is what they actually say. The Queensland Government calls it the first relatively complete Australian dinosaur fossil found, and the first Australian dinosaur to be fully reconstructed as a life-size model.[1] The Australian Museum calls it one of the most complete dinosaurs from Australia, about 60 per cent complete, and the first to be cast and mounted for display.[16] Those are the museums' own statements; we did not find an independent palaeontological paper confirming "first" in either sense. The 1981 description itself called the specimen "the most completely known dinosaur yet discovered from Australia".[15]
The animal was a plant-eater about seven metres long by the Australian Museum's figure and the original 1981 description, and seven to eight metres by the Queensland Government.[16][15][1] Its odd bulge of a nose has been argued over for decades. The original description left its function open, and smell or sound were later suggested. Queensland Museum researchers who CT-scanned the original recently described it as containing previously unknown bones and air chambers, and reported teeth at the very front of the snout that were thought to be absent in this kind of dinosaur.[17] The 2026 study found that the bulge is built from other bones and encloses airway chambers, which the authors read as pointing to a keen sense of smell.[14]
Two towns now carry the animal. Muttaburra has the Muttaburrasaurus Interpretation Centre at 9 Bruford Street, with replicas of the original bones,[4] and a statue in the park on the same street.[5] Hughenden has a life-size replica skeleton called Hughie at the Flinders Discovery Centre,[6] described by RACQ as a seven-metre statue cast from muttaburrasaurus bones.[8] It also has Mutt, a full-bodied replica on Stansfield Street, which RACQ describes as a fibreglass version.[7][18] Visit Hughenden calls both Hughie and Mutt life-size.[6][19] No source we read gives a scale for the Muttaburra statue or the Interpretation Centre replicas, so we make no claim about them. Hughenden has its own link to the animal as well: another specimen was found near the town in 1987.[6]
Mutt the Muttaburrasaurus
Hughenden, Queensland · Animals and creaturesA life-size Muttaburrasaurus model in central Hughenden.

Hughenden's ammonite

The odd one out is the Big Ammonite, because it is a sculpture rather than a replica of a find. RACQ describes it as made from windmill parts, a sculpture of a marine mollusc used as an index fossil.[8] Visit Hughenden lists an "Ammonite Sculpture" in town but gives no maker or date.[7] Windmill parts are a fitting material for a sea creature in dry grazing country, though no source says that was the intention.
The Big Ammonite
Hughenden, Queensland · Public artA giant ammonite representation made from windmill parts in Hughenden.

Richmond: a museum, a sea monster and an argument about length

Kronosaurus Korner's own history gives the Richmond story. The museum says its catalyst was the 1989 discovery of the "Richmond Pliosaur" on a property called Marathon Station. Despite the nickname, the museum's collection page identifies the specimen as a polycotylid plesiosaur, not a true pliosaur, and says palaeontologists recognise it as one of the best preserved Cretaceous marine reptile fossils in the world.[20] The museum opened in 1995 in the old Strand Theatre building, and Richmond Shire Council took over management of the information centre in 1999. It reports nearly 1,150 unique fossil specimens.[2]
It is named for Kronosaurus queenslandicus, and a full-size replica stands outside.[2] The museum's figure for the animal is 11 metres,[2] while its collection page gives about 10 to 11 metres.[21] Length estimates vary. The species was described in 1924 by Heber Longman from the front of a lower jaw, collected in 1899 from an unrecorded locality near Hughenden.[21] The best-known skeleton went to Harvard in the early 1930s and was heavily restored with plaster, about a third of the mount by one account, earning the nickname "Plasterosaurus".[21][22] Its original mount was given a "generous 42 feet" (12.8 metres), and the plaster additions had lengthened it from about 10.5 metres.[22][21] Richmond's replica sits at the upper end of the modern estimates, but the animal's true length remains an estimate.
The collection goes beyond roadside replicas. The museum’s collection page describes a skeleton found in 1978 on Toronto Park Station near Richmond as the most complete Kronosaurus queenslandicus on display in Australia, a description that is the museum's own.[21]
The Big Kronosaurus
Richmond, Queensland · Animals and creaturesA life-size Kronosaurus model outside Kronosaurus Korner in Richmond.
Definitive Field Guide

Eulo: Kenny and the mud springs

The Diprotodon at Eulo is bronze, and it represents one particular animal. The Eromanga Natural History Museum says the first Diprotodon excavated from the Eulo sites was nicknamed Kenny after the landholder who originally found the sites, and that a life-sized bronze in Eulo represents the specimen.[3] The same museum says remains from several individuals have been systematically excavated at the sites since 2011.[3]
The public announcement came in June 2012, when ABC News reported that Queensland Museum and Griffith University scientists, working with volunteers and the Outback Gondwana Foundation, may have unearthed up to 40 giant marsupials north of Eulo. Museum scientist Scott Hocknull called Kenny one of the largest and best preserved megafauna finds he had seen.[23] The dates fit together loosely: the Eromanga museum says systematic excavation began in 2011,[3] the plaque text quoted by Cunnamulla Tourism dates the discovery to 2011 as well,[24] and the Queensland Museum's blog places the find in 2012, the year of the public announcement.[25]
The age is similarly loose. The 2012 report gave a general range for the animals of between 1.6 million and 40,000 years ago, and reported Hocknull saying the fossils could be up to 200,000 years old.[23] We found no published date for the deposit. The Queensland Museum says the Eulo bones were preserved in ancient mud springs, where animals got stuck, and describes Diprotodon as about the size of a rhinoceros;[10] the Eromanga museum gives Kenny as about three metres long, two metres tall and 2,800 kilograms.[3]
Why Diprotodon and Australia's other giant animals disappeared is debated. The Queensland Museum lists climate change, human activity or a combination as proposed causes, and we take no side here.[10]
The sculptors' website credits the bronze to Gillie and Marc, commissioned by Paroo Shire Council, who it says worked with Queensland Museum palaeontologists using Kenny's bones to make the figure biologically accurate.[9] Kenny stands in Eulo, where the bronze commemorates the megafauna fossils found nearby.[3][26]

Chillagoe: a community group builds an elasmosaur

In October 1999, Queensland Museum palaeontologist Alex Cook told ABC radio about a five-metre-long elasmosaur fossil discovered by a fisherman in outback north Queensland. The animal was nicknamed Dave after its finder. The fossil was about 80 per cent complete, Cook said, although its skull was missing.[27][28] A later Queensland Museum paper locates the Walsh River specimen west of Chillagoe and assigns it to rocks about 115 million years old.[29]
The town's roadside Dave came later. In December 2008, the Queensland Government announced $10,000 in Q150 funding for the Chillagoe Alliance to create a life-size reproduction for the town entrance.[11] In the Queensland Parliament on 7 October 2009, the local member reported attending its unveiling the preceding Saturday and described a five-metre-long model beside the Burke Developmental Road.[30] A later local tribute credited Chillagoe Alliance member Mary Bolam with supporting the project and helping bring in an expert modeller from Queensland Museum.[31]
The replica has a head; the original fossil did not. That small artistic decision is also a reminder of what these roadside giants are: public interpretations of real scientific discoveries, not the fossils themselves.
Dave the Elasmosaur
Chillagoe, Queensland · Animals and creaturesA life-size five-metre replica of the prehistoric marine reptile known as Dave, standing at the southern entrance to Chillagoe.

Finding them

Hughenden is on the Flinders Highway,[32] and so is Richmond, about 115 kilometres further west.[33][34] Muttaburra is on the Thomson River in central-west Queensland.[4] Eulo is reached by the Bulloo Developmental Road, which links it to Cunnamulla and Thargomindah.[35] Chillagoe is around 200 kilometres by road from Cairns.[12] Check current road conditions before setting out, particularly after rain.

Sources

1.
Muttaburrasaurus langdoni (Queensland fossil emblem), Queensland Government, Department of the Premier and Cabinet. Accessed 17 October 2026.
2.
About us, Kronosaurus Korner. Accessed 17 October 2026.
3.
Diprotodon optatum, Eromanga Natural History Museum. Accessed 17 October 2026.
4.
Muttaburrasaurus Interpretation Centre, Outback Queensland Tourism Association. Accessed 17 October 2026.
5.
Muttaburra, Outback Queensland Tourism Association. Accessed 17 October 2026.
6.
Unearthing dinosaurs: a history of discovery in Hughenden, Visit Hughenden. Accessed 17 October 2026.
7.
Art and History Trail, Visit Hughenden. Accessed 17 October 2026.
8.
Seven Big Things to see in north-west Queensland, RACQ. Accessed 17 October 2026.
9.
Diprotodon (commission), Gillie and Marc. Accessed 17 October 2026.
10.
What are megafauna?, Queensland Museum Network blog. Accessed 17 October 2026.
11.
Q150 Chillagoe Elasmosaur project (Ministerial statement, 10 December 2008), Queensland Government. Accessed 17 October 2026.
12.
Cairns to Chillagoe self-drive itinerary, I Love Cairns. Accessed 17 October 2026.
13.
Rare new fossil find the 'Rosetta Stone' of marine palaeontology, Queensland Museum Network. Accessed 17 October 2026.
16.
Dinosaurs: Muttaburrasaurus langdoni (fact sheet), The Australian Museum. Accessed 17 October 2026.
17.
How Queensland Museum's Muttaburrasaurus is rewriting dinosaur history, Queensland Museum Network blog. Accessed 17 October 2026.
18.
Hunt for Queensland's Big Things, RACQ. Accessed 17 October 2026.
19.
Hughenden accessibility, Visit Hughenden. Accessed 17 October 2026.
20.
Penny the Plesiosaur, Kronosaurus Korner. Accessed 17 October 2026.
21.
Kronosaurus (museum collection), Kronosaurus Korner. Accessed 17 October 2026.
22.
The Frustrating Legacy of Plasterosaurus, National Geographic. Accessed 17 October 2026.
23.
Giant marsupials' graveyard unearthed in Queensland, ABC News. Accessed 17 October 2026.
24.
Eulo Diprotodon, Cunnamulla Tourism. Accessed 17 October 2026.
25.
London, Paris, Thargomindah, Queensland Museum Network blog. Accessed 17 October 2026.
26.
Eulo Diprotodon Statue (Kenny), 8 January 2026, Outback Queensland Tourism Association. Accessed 20 October 2026.
27.
Loch Ness Dave (The World Today, 14 October 1999), ABC Radio National. Accessed 20 October 2026.
28.
Marine reptiles, Queensland Museum Network. Accessed 17 October 2026.
31.
Vale Mary Bolam, champion of Chillagoe's rich history, The Express. Accessed 17 October 2026.
32.
Hughenden, Outback Queensland Tourism Association. Accessed 17 October 2026.
33.
Location, Kronosaurus Korner. Accessed 17 October 2026.
34.
Hughenden to Richmond, Drive North West Queensland. Accessed 17 October 2026.
35.
Paroo River Bridge, Eulo (Queensland Government statement, 3 June 2026), Queensland Government. Accessed 17 October 2026.
•
Eulo, Outback Queensland Tourism Association. Accessed 17 October 2026.

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