Bushcraft is the use and practice of skills, thereby acquiring and developing knowledge and understanding, in order to survive and thrive in a natural environment. Bushcraft skills provide for the basic physiological necessities for human life: food (through foraging, tracking, hunting, trapping, fishing), water sourcing and purification, shelter-building, and firecraft. These may be supplemented with expertise in twine-making, knots and lashings, wood-carving, campcraft, medicine/health, natural navigation, and tool and weapon making. Bushcraft includes the knowledge to handle certain tools such as bushcraft knives and axes. A bushcrafter can use these tools to create many different types of constructions, from dugout canoes to a-frame shelters. There are various types of shelters to construct or use in the wilderness. The first is a purpose-built shelter like a tent. Another example is an improvised shelter, like using a large tarp or blanket as a tent. Indigenous shelters include a snow cave or bark lean-to. Lastly, natural shelters include caves, underneath a tree, or within thickets. Bushcraft includes the knowledge to tie different knots for different purposes. These knots include the reef knot, figure 8 loop, improved clinch knot, clove hitch, and snare noose. The reef knot is also referred to as a square knot. It is good for bundling items together because you can tension the rope during the first part of the knot tying. Tying bondages together like a sling is a common use. The figure 8 loop is a strong knot because it forms a loop that will not draw tight. You can use a figure 8 loop at the end of a fishing line to tie on a hook or lure. This knot is also useful to hold loads or to lift or drag items. The improved clinch knot is often used to attach a hook to a line or to attach an anchor to rope, or fore tying up to a pole or tree. The clove hitch can be used when creating a raft or to attach a shelter to a tree. It is commonly used to start a lashing, binding one thing to another such as a shelter frame. The snare noose use is commonly used to catch animals. The snare consists of a noose attached to an anchor point like a shrub. As the animal moves through the noose, the line will tighten around its neck. The term bushcraft was popularized in the Southern Hemisphere by Les