“Rooster-Crested Killer”: New US Carnivore with Dramatic Cock’s-Comb Crest Stuns Paleontologists

In a discovery that has turned heads across the dinosaur world, scientists have named Alectororaptor gallinaceus — a striking carnivorous theropod from 150-million-year-old rocks in Utah sporting a flamboyant, rooster-like cranial crest unlike anything previously seen in North American predators.

Described in a July 2026 Journal of Vertebrate Paleontology paper, the near-complete skull and partial skeleton were unearthed in 2023 from the Morrison Formation by a University of Utah team led by Dr. Mark Loewen. The animal, roughly 4 metres long and 150 kg, possessed a tall, fleshy, comb-shaped crest running along the midline of its skull, brightly coloured in life and supported by a bony core — eerily reminiscent of a modern rooster’s comb.

The crest’s most likely function was visual display for courtship and rival intimidation, exactly as in living birds. CT scans show extensive vascular grooves, indicating it was richly supplied with blood and could flush bright red during displays. Its serrated teeth and powerful limbs confirm it was an agile predator of smaller dinosaurs and reptiles in the lush Morrison floodplains.

Loewen called the find “a living, breathing rooster from the Jurᴀssic — proof that elaborate headgear evolved early in theropods.” The discovery bridges the gap between early crested dinosaurs like Dilophosaurus and later flamboyant lineages, showing Sєxual selection drove extreme ornamentation across the theropod tree.

Now on display at the Natural History Museum of Utah with a vibrant life reconstruction, Alectororaptor gallinaceus (“rooster thief”) proves North America’s Jurᴀssic hosted predators every bit as showy as they were ᴅᴇᴀᴅly.