BLACK MAMBA — World’s Fastest Land Snake
The black mamba is the longest venomous snake in Africa, averaging around 2.5 meters (8.2 ft), and sometimes growing up to 4.3 meters (14 ft). Its name is derived from the black colouration inside the mouth rather than the actual colour of the skin which varies from dull yellowish-green to a gun-metal grey. It is the fastest snake in the world, capable of moving at 4.32 to 5.4 metres per second (16–20 km/h, 10–12 mph)
It is reported that before the antivenom was widely available, the mortality rate from a Black Mamba bite was 100%. Black mamba bites can kill a human within 20 minutes or less depending on the nature of the bite and the area bitten — death usually occurs after 30–60 minutes on average
However, this snake is usually is shy and secretive; it always seeks to first escape a confrontation if possible. If a black mamba is cornered it mimics a cobra by spreading a neck-flap, exposing its black mouth, and hissing. If this endeavor to scare away the attacker fails, the black mamba may strike repeatedly. The black mamba is a diurnal snake. Although its scientific name seems to be indicative of tree climbing, the black mamba is rarely an arboreal snake. These snakes retreat when threatened by predators.