Um...I'll have to ask the experts in the family. I kind of thought
whatever birds came down there for the winter would generally head
back north by a certain time. I was wondering if March would be too
late to see them for instance.


Like I said, it all depends on which birds you are looking for.
These guys are the local authority about birds we have here but I regularly see
most of the wading birds (egrets, herons, ibis, spoonbills) year around.