Sprouting

One of the trees in our garden has sprouted! I've never seen any of them do this in the nearly 2 years we have lived here (there are 4 or 5 of them in the garden). I still don't know what kind of tree they are though... they are really tall, thin and bendy, and make a wonderful noise like rain in the breeze. They don't appear to produce fruit, or to lose their leaves much. Any ideas?