Could you please advise me of most reasonable priced Shure microphone suitable for wildtrack effect recording in the field using a portable recorder? The sound sources will be birds, trains, cars, church bells etc..
Check out the Shure VP88 and the Shure SM63.
However, your ears must make the final decision. We can only make recommendations on models for you to audition.
For a complete listing of microphones that we recommend for ambient recording, see our online Microphone Techniques for Recording.