The red-naped snake (Furina diadema) is a small venomous reptile[2] from the family Elapidae.

On the back of the neck there is a well defined patch of orange or red in the shape of a diamond, crescent or oval.

If threatened they will strike out several times with their forebody held in the air, most often with a closed mouth.

[7] They shelter under rocks and fallen timber, in ant or termite nests,[5] under wood piles, leaves, old sheets of iron, in crevices[7] and abandoned burrows.

[3] It is found in arid to humid parts, from Port Augusta in South Australia to Cairns in northern Queensland.

[7] Some areas in which they have been sighted include the Coongie Lakes Ramsar Site in South Australia;[8] Woomargama National Park and Mullengandra in NSW Murray Catchment;[5] in the Lower Murray darling basin, NSW;[9] around Alice Springs in the Northern Territory; the Museum of Victoria notes this species is in the far north-west of the state, in riverine areas;[10] 18 National Parks in Queensland.

[1] The red-naped snake is oviparous,[5] Records for clutch sizes vary: 2–5,[6] 1–10,[2] 3–6,[11] 1–5, 8 and an average of 3.

[2] They eat more in the warmer times of the year and hunt for food in restricted places such as burrows and fissures.