When harvesting your walking sticks try to select the best possible stick, look for straightness with no damage before you cut. Sometimes its not easy when you see the prefect walking stick shaft then you cut it down only to find there's a "dogs leg" or some damage n the bark. Try not to throw away any stick shafts you cut down, save them and you might be able to get a use for them somewhere.
The most popular walking sticks are made from hazel in the UK and Ireland because of the abundance of hazel available in out countryside its also lightweight and very durable. But there are many more types of woods to go for, walking sticks can be made from any timber you like.
Blackthorn walking sticks look great but are the most difficult to find, rowan, holly, hazel, oak can all be used for walking sticks its all up to you.