Indigo Snake

The eastern indigo snake (Drymarchon couperi) is a large nonvenomous snake native to the Eastern United States. It is of note as being the largest native snake species in the U.S.

The eastern indigo snake is an even blue-black coloration, with some specimens having a reddish-orange to tan color on the throat, cheek and chin. This snake received its name from the glossy iridescent blackish-purple sheen it displays in bright light. This smooth-scaled snake is considered to be the largest native snake species in the United States. The longest recorded specimen measured 2.8 m (9.2 ft). Unlike many snakes, mature male indigo snakes are slightly larger than females. A typical mature male measures 2.13–2.36 m (7.0–7.7 ft) and weighs 3.2–4.5 kg (7.1–9.9 lb), whereas a mature female typically measures around 2 m (6.6 ft) in length and weighs 1.8–2.7 kg (4.0–6.0 lb). In specimens over 2.6 m (8.5 ft), these snakes can weigh up to 5 kg (11 lb). Although the indigo snake is heavier on average, unusually large specimens of the co-occurring Eastern diamondback rattlesnake can outweigh them.