Western Brown Snake
Pseudonaja nuchalis • Order: Squamata, Suborder: Serpentes, Family: Elapidae, Subfamily: Hydrophiinae, Genus: Pseudonaja, Species: Pseudonaja nuchalis
Endemic to mainland Australia, widely distributed across arid and semi-arid interior regions, extending into some coastal areas.
Look up Western Brown Snake in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Elapidae, Subfamily: Hydrophiinae, Genus: Pseudonaja, Species: Pseudonaja nuchalis
Conservation
Listed as Least Concern on the IUCN Red List due to its extremely wide distribution, presumed large population, and high adaptability to modified landscapes.
Physical Description
Slender to moderately robust body with smooth scales. Coloration is highly variable, ranging from light brown, reddish-brown, to dark brown or grey. Often displays a dark head and neck, sometimes with dark bands or blotches along the body, and round pupils.
Size & Dimensions
Estimated specimen length is approximately 1.2 meters. Average adults reach 1.5 to 1.8 meters, with maximum recorded lengths approaching 2.0 meters.
Habitat
Inhabits arid and semi-arid grasslands, shrublands, sparse woodlands, and sandy desert environments. Often found sheltering in soil cracks, fallen timber, or abandoned burrows.
Diet & Feeding
Feeds primarily on vertebrates, including small mammals (such as rodents), lizards, birds, and occasionally other snakes. Active forager utilizing keen vision and chemoreception.
Reproduction
Oviparous, laying clutches typically ranging from 10 to 25 eggs, usually deposited in underground burrows, rotting logs, or beneath rocks during the warmer months.
Look-alikes
Can be confused with other Australian brown-colored snakes such as the Mulga Snake (Pseudechis australis) or other Pseudonaja species. Distinguished by head markings, scale counts, and subtle variations in coloration.
Conservation Status
Listed as Least Concern on the IUCN Red List due to its extremely wide distribution, presumed large population, and high adaptability to modified landscapes.
Cultural Significance
Plays a vital ecological role in controlling rodent and vertebrate populations in arid Australian ecosystems. Highly regarded in Indigenous Australian culture and modern wildlife management.
Notable Features
Exhibits extreme color and pattern polymorphism across its vast geographic range, allowing local populations to blend effectively into diverse regional soil and substrate types.