Red-bellied Black Snake (Pseudechis porphyriacus)
This photograph captures the behavior of the Red-bellied Black quite well. Though they are a venomous (Elapidae family) snake, their first instinct when being approached is to seek cover. Since seeing my first in the (southern hemisphere) spring of 2017, I've observed dozens and they've all behaved similarly. The most daring of them was in the Blue Mountains, which upon stopping when I saw it on the path, came towards me. I stepped off the path and let it pass without incident. It can also be a challenge to capture the titular red belly without the snake being reared up in a defensive posture.
Redbellied Black SnakesnakeelapidaeelapidreptilesnakesvenomousNew South WalesAustraliaMugii MurumbannaturewildlifeanimalsAndrew Schopieray, from