Brightly colored, or strong smelling insects are a clear warning sign for you to avoid, many are poisonous.

Wind speed. While not precise directional guides, moss on trees and ant hills can help you to figure out what direction you're facing. In the Northern Hemisphere, moss on the south side of trees will be thicker and greener because that side often gets more sun; ants often build their nests on the south or southeastern side of trees, where it's warmer.

Hypothermia happens during all seasons and temperatures, usually due to exposure to water that leads to the lowering of your body temperature.

The human body begins severe dehydration, that leads to death in 3 days.

Sun exposure, frostbite and dehydration can take days to kill you, hypothermia happens in a matter of minutes.

Sleeping on the ground can lead to loss of body heat. You'll retain more warmth by piling grass or pine needles on the ground to sleep on.

Staying near a source of water is a good idea when building a shelter. You should avoid natural hazards like cliffs and dry river beds.

Plant life, insects, bird flight paths and animal tracks can all point toward water sources.

Bacteria begins to break down at 160° Fahrenheit.

A healthy person, properly hydrated, can last up to 8 weeks without food. This is not to say that they will be able to operate as they normally would with food. The starvation process will leave you without energy and unable to perform basic survival tasks.

Insect eggs can be found in moist areas under rocks and inside rotten tree logs or stumps.

The ability to shelter yourself from the elements, start a fire, clear brush, defend yourself, and provide clean drinking water are the most important tools. A compass is a very important tool, however if you are lost, the most recommended strategy is to shelter in place for those who will be looking for you.