Selecting a tree for Bonsai

While any tree can be made into a Bonsai it is necessary to choose a species of tree keeping the following factors in mind.

Climatic condition. 
Trees should be chosen keeping the climatic conditions in mind. Try to locate a tree which can survive in your particular  temperature. Certain trees cannot withstand heat while still others will not tolerate cold. Some trees may be vulnerable to pests and insects.  Such trees are best avoided.

Look at the adult tree of the species from a distance and see if you like it. Personal preference is important. 

A Bonsai is  an investment of a great deal of time and effort.  Select the tree you like after observing all its features such as the trunk, the branches and the leaves.