Birding or twitching

Is there a difference between birding and twitching.?

 

Do I get classed as a twitcher or birder, ?

 

I watched that programme last week and personally im not interested in driving to the North Of Scotland in the hope of seeing some rare bird. I would rather wait until they come to me . I go to all our local reserves ie. Cosmeston lakes, Kenfig Park Nature Reserve. Forest Farm etc  I photograph what I see . And to be honest I am happy to improve my photgraphy on birds.

Do you go twitching or birding ?. I am off to Cosmeston or somewhere tomorrow to do what I class as birding ( birdwatching ). So is there a difference.